Macmillan Holdings, LLC. mathdude, QDnow, and Quick and Dirty Tips are trademarks of Macmillan Holdings, LLC. Learn how to use the power of ten percent, and not your calculator, to easily and quickly calculate how much to tip. Staci sampleCategory If my charge was $141.00 and I was only paid $83.37 how do I figure the percentage paid? http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=61338#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=61338#Comments Wed, 24 Apr 2013 14:49:24 GMT Wtf??? sampleCategory Whatevs!!!! http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=61278#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=61278#Comments Mon, 22 Apr 2013 16:09:18 GMT Math Dude sampleCategory @Natalie: Good catch! It looks like I interpreted the problem as saying that the new cost is 86% of the original (a 14% discount). But, as you point out, it actually says that it's 86% *off* the original (an 86% discount), which means that the new cost is 100% – 86% = 14% of the original. So, using the same logic I outlined before, the original_price = $9 / 0.14 = $64.29. http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=59142#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=59142#Comments Thu, 28 Feb 2013 19:20:09 GMT Natalie sampleCategory I dont get your answer to @KMD who asked "If something is $9 now and it is 86 % off, how much was it origionally...? YOU SAID: We know that 0.86 * original_price = current_price. If we divide both sides by 0.86, we see that original_price = current_price / 0.86. Now just plug the current_price in to get the original. SO: 86% of 9$ isn't $10.46 is it? just doesn't seem high enough to me. http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=59099#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=59099#Comments Wed, 27 Feb 2013 21:07:40 GMT karen steele sampleCategory Thank you for your tips and tricks ....cant wait to buy the book http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=56705#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=56705#Comments Mon, 24 Dec 2012 06:08:19 GMT destany sampleCategory i dont understand how u are saying to do the problems and how to do them http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=56002#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=56002#Comments Wed, 28 Nov 2012 14:16:35 GMT Math Dude sampleCategory @kfitd1991: Just divide the amount of weight lost by the starting weight and then multiply that by 100. So in your example, 25 pounds is equal to 25 / 216 * 100 = 11.6% of 216 pounds. http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52625#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52625#Comments Mon, 23 Jul 2012 18:33:07 GMT kfitd1991 sampleCategory Wondering can anybody help me out ... Im a fitness instructor working with people who are looking to lose weight . We run weight loss camps in our gym and I have been trying to figure out how to get a percentage of somebody's weight. For example : one girl lost 25pounds in our last camp, she weighted 18stone starting the camp which is the same as 216pounds. How do I figure out what percentage 25pounds is of 216. If anybody can give me an easy way to figure equations like this out it would be a big help thanks. http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52575#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52575#Comments Sat, 21 Jul 2012 11:14:07 GMT Jleigh sampleCategory I LOVE YOU! I'm horrid at math so Thanks :) http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52379#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52379#Comments Sat, 14 Jul 2012 16:47:09 GMT Westley sampleCategory Kevin (8/9/2010 1:52:39 PM) is obviously in a county in California where they have an additional tax. In my county, the tax is 7.75%, so to calculate a 15% tip, all I have to do is double the tax. Of course, if the waitstaff deserves a 20%, then doubling the easily-calculated 10% works well, too! http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52071#Comments http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx?commentid=52071#Comments Wed, 04 Jul 2012 17:59:07 GMT Wed, 24 Apr 2013 14:49:24 GMT http://mathdude.quickanddirtytips.com/how-to-use-percentages-to-easily-calculate-tips.aspx feedback@quickanddirtytips.com (Managing Editor) feedback@quickanddirtytips.com (Webmaster) en-us