 My Math Forum Give more weighting to one percentage than the other
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 November 17th, 2014, 06:36 AM #1 Newbie   Joined: Nov 2014 From: leeds Posts: 2 Thanks: 0 Give more weighting to one percentage than the other Hi Everyone, First of all apologise if this is in the wrong section, I wasn't sure where it should go. I have 2 percentages and am finding the average of the 2 by multiplying them together like in the example below: first percentage: 125% second percentage: 75% 1.25 * 0.75 = 93.75% My question is, is it possible to be able to give one percentage more of a weighting than the other number? So for example, I could say I trust the second figure more so give the second figure a certain amount more weighting in the calculation than the first number? Thanks ... I'm putting this in just because it looks funny  November 17th, 2014, 01:05 PM #2 Global Moderator   Joined: May 2007 Posts: 6,820 Thanks: 722 The average of two numbers is the sum divided by 2. If you think one is better you can give it a weight w > 1/2 and give the other a weight 1-w. November 17th, 2014, 09:33 PM #3 Newbie   Joined: Oct 2014 From: Australia Posts: 27 Thanks: 10 To find the average it's $\displaystyle \frac{a+b}{2}$ , which can be written as $\displaystyle \frac{a}{2} + \frac{b}{2}$ If you want to weight one more than the other, then change the fractions. For example, if you trusted a about twice as much as b, you could find it with $\displaystyle \frac{2}{3}a + \frac{b}{3}$ Just make sure that the fractions add up to 1. Tags give, percentage, weighting Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post tyrone Linear Algebra 0 January 8th, 2014 03:16 AM dadakevino Algebra 3 November 21st, 2013 08:05 AM Jennifer Murphy Advanced Statistics 4 February 24th, 2012 12:01 AM sharp Elementary Math 3 October 27th, 2010 03:36 PM CRGreathouse New Users 5 October 10th, 2008 10:26 PM

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