Members Chezdon Posted February 19, 2009 Members Share Posted February 19, 2009 How do you work out what the figure was before a percentage was added to it? For example: I have a final figure of 5000. I know 25% was added to a figure to get to 5000. How do I work out what that figure was? Thanks in advance! Problem at work Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 x + (x*0.25) = 5000 1.25x = 5000 dont make me do the rest Quote Link to comment Share on other sites More sharing options...
Members KCTigerChief Posted February 19, 2009 Members Share Posted February 19, 2009 4000 just saw you wanted how to get it...Mr. Martin gave you that Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 ps you need to go back through school if thats trouble for you AND you need to do it for work Quote Link to comment Share on other sites More sharing options...
Members Chezdon Posted February 19, 2009 Author Members Share Posted February 19, 2009 Well I did A level maths... I've just totally forgotton it and had a mind blank!! We've gotta work out costs for something but only have the final figure... I don't really get your formula either, please explain Quote Link to comment Share on other sites More sharing options...
Members KCTigerChief Posted February 19, 2009 Members Share Posted February 19, 2009 Well I did A level maths... I've just totally forgotton it and had a mind blank!! We've gotta work out costs for something but only have the final figure... I don't really get your formula either, please explain X is the cost you are trying to find. x*.25 is 25% of what the value you are trying to find. In order to get to 5000 you have to take the original value (x) and add that to the 25% of x since there is (1) X plus 25% of another X, that leaves you with 1.25X = 5000 Divide 5000 by 1.25 to get your value of X... Quote Link to comment Share on other sites More sharing options...
Members zoomzilla Posted February 19, 2009 Members Share Posted February 19, 2009 Damn. Make it easy for the dude. 5000 / 1.25 = 4000 You take your final figure and divide by 1+the percentage applied to get to the final figure to get the original amount. Works the same as the formula above, but is much simpler to remember. Quote Link to comment Share on other sites More sharing options...
Members GeorgeWFletcher Posted February 19, 2009 Members Share Posted February 19, 2009 Well I did A level maths... I've just totally forgotton it and had a mind blank!! We've gotta work out costs for something but only have the final figure... I don't really get your formula either, please explain 5000 divided by 1.25 = 4000 Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 its basic first-year algebra i didnt know it needed to be spelled out ztevin did it though, so thanks to him Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 Damn. Make it easy for the dude. 5000 / 1.25 = 4000 You take your final figure and divide by 1+the percentage applied to get to the final figure to get the original amount. Works the same as the formula above, but is much simpler to remember. yeah but you get into trouble when all you can remember is the cliffs notes version and dont know how to derive the solution to anything anymore Quote Link to comment Share on other sites More sharing options...
Members KCTigerChief Posted February 19, 2009 Members Share Posted February 19, 2009 Damn. Make it easy for the dude. 5000 / 1.25 = 4000 You take your final figure and divide by 1+the percentage applied to get to the final figure to get the original amount. Works the same as the formula above, but is much simpler to remember. :lol: - yea, that's easy - but he asked for explanation and how to get it...that way is much easier to remember...But since he's doing it for work, he needs to understand what the "F" he is doing in my opinion Quote Link to comment Share on other sites More sharing options...
Members joemudge4 Posted February 19, 2009 Members Share Posted February 19, 2009 And we thought our american schools were bad... Quote Link to comment Share on other sites More sharing options...
Members KCTigerChief Posted February 19, 2009 Members Share Posted February 19, 2009 its basic first-year algebra i didnt know it needed to be spelled out This. FWIW i learned this stuff in 7th grade, and that was 15 years ago? If you are working around this stuff, it's really something you should understand and know how you are coming up with that number...Otherwise you'll never understand why or when you are wrong if you come up with the wrong figure Quote Link to comment Share on other sites More sharing options...
Members Chezdon Posted February 19, 2009 Author Members Share Posted February 19, 2009 X is the cost you are trying to find. x*.25 is 25% of what the value you are trying to find. In order to get to 5000 you have to take the original value (x) and add that to the 25% of x since there is (1) X plus 25% of another X, that leaves you with 1.25X = 5000 Divide 5000 by 1.25 to get your value of X... Been about 8 years since I've done this. I could work it out on my own but I'm under pressure here! Thanks ztevin, more than helpful. Unlike that pompous {censored} jnmartin. Quote Link to comment Share on other sites More sharing options...
Members satannica Posted February 19, 2009 Members Share Posted February 19, 2009 OK 5000 is the final, right? So 5000 is 125% of whatever the figure was. 125% can also be expressed as a decimal as 1.25 So if I had a figure and wanted to add 25%, I would multiply it by 1.25. That would tell me what 1.25 or 125% of a figure is. So this works for any percentage. 1. whatever % increase. So your sum is 5000 / 1.25 to get the reverse = 4000 Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 Been about 8 years since I've done this. I could work it out on my own but I'm under pressure here! Thanks ztevin, more than helpful. Unlike that pompous {censored} jnmartin. Go home and cry yourself to sleep tonight because you aren't qualified for your job. Nothing pompous about what I wrote, if you can't divide two numbers you need to be flipping burgers bro. I took algebra back in 1996 and I can still remember it just fine. Quote Link to comment Share on other sites More sharing options...
Members Chezdon Posted February 19, 2009 Author Members Share Posted February 19, 2009 Ok - my job doesn't centre around maths this is a one off. Just go spout your holier than thou {censored} elsewhere. I had a choice - come here and get an answer in 5 minutes whilst doing other work or sit down ignoring my clients and working it out. I took the lazy option. Thank you to everyone else for explaining. Quote Link to comment Share on other sites More sharing options...
Members jnmartin Posted February 19, 2009 Members Share Posted February 19, 2009 :cry: Quote Link to comment Share on other sites More sharing options...
Members GeorgeWFletcher Posted February 19, 2009 Members Share Posted February 19, 2009 Ok - my job doesn't centre around maths this is a one off. Just go spout your holier than thou {censored} elsewhere. I had a choice - come here and get an answer in 5 minutes whilst doing other work or sit down ignoring my clients and working it out. I took the lazy option. Thank you to everyone else for explaining. No need to be so hostile, he was trying to help. Quote Link to comment Share on other sites More sharing options...
Members Chezdon Posted February 19, 2009 Author Members Share Posted February 19, 2009 I'm just stressing. I got a nice new EC1000 at home that needs playing and I'm stuck with this {censored} that needs to be done in 10 minutes when some guy's been sitting on it all day. Yes, he was being helpful, but also being a dick. Quote Link to comment Share on other sites More sharing options...
Members zoomzilla Posted February 19, 2009 Members Share Posted February 19, 2009 yeah but you get into trouble when all you can remember is the cliffs notes version and dont know how to derive the solution to anything anymore No, I understand that. It sounded like he wanted a quick answer, not a math lesson, so I thought just giving him the quick answer would be the best route. But you are correct, it is good to know the logic behind it. Quote Link to comment Share on other sites More sharing options...
Members Chezdon Posted February 19, 2009 Author Members Share Posted February 19, 2009 You failed, right? I mean, really, really horribly failed. Well I got a D. so A, B, C, D then E. Not the best... I was good at maths - sitting at a desk for 5 years combined with not using any algebra since then has caused me to forget! Jeez. I'm sure there's things in school you've forgotten... As I said - it's coming back to me now, I just haven't used it in so long. FFFFFFFFFFFUUUUUUUUUUUUUUUU Quote Link to comment Share on other sites More sharing options...
Members satannica Posted February 19, 2009 Members Share Posted February 19, 2009 I got an A for A-Level maths and even I {censored} up simple stuff sometimes! Yes, a God such as I.... Quote Link to comment Share on other sites More sharing options...
Members olgluefoot Posted February 19, 2009 Members Share Posted February 19, 2009 I am the worst at math. Im not sure I can divide on paper. I always struggled with it in school. And cheated my way through high school in math. I would like to get around to learning it though. Quote Link to comment Share on other sites More sharing options...
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