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 May 22nd, 2013, 01:33 PM #1 Newbie   Joined: May 2013 Posts: 5 Thanks: 0 Discounts Hi, this is probably rediculusly simple biut I just cant seem to work it out How do I work out the percentage of discount from the original price e.g. T Shirt each = $10.00 X 20 Tshirts each =$ 9.65 a discount of ? % x 50 T Shirts each = $9.00 a discount of ? % and so on Any help would be greatly appreciated Many thanks Ross http://www.promonz.com  May 22nd, 2013, 02:49 PM #2 Global Moderator Joined: Nov 2006 From: UTC -5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms Re: Discounts 1 - discounted price / normal price is the discount, multiply by 100% to get a percent.  May 22nd, 2013, 02:55 PM #3 Math Team Joined: Apr 2012 Posts: 1,579 Thanks: 22 Re: Discounts$9 is obviously 9/10 of $10. 1-9/10 = 1/10 or 10% Now try the harder one. May 22nd, 2013, 02:56 PM #4 Math Team Joined: Apr 2012 Posts: 1,579 Thanks: 22 Re: Discounts Quote:  Originally Posted by johnr$9 is obviously 9/10 of $10. 1-9/10 = 1/10 or 10% Now try the harder one. To clarify why CRG and I are not being inconsistent. The discounted price is 90% OF the normal price, which is that same as saying that it is 10% OFF the normal price.  May 22nd, 2013, 04:32 PM #5 Newbie Joined: May 2013 Posts: 5 Thanks: 0 Re: Discounts Yep thats great 9.65 divided by 10 = 0.965 10 -.965 = 9.035 so 9.03 % ? But if I get my calculator and go 10 - 9.03 % = I get$ 9.09 not $9.65  May 22nd, 2013, 06:57 PM #6 Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,412 Thanks: 1024 Re: Discounts WHY did you include that commercial link in your original post?  May 22nd, 2013, 08:28 PM #7 Newbie Joined: May 2013 Posts: 5 Thanks: 0 Re: Discounts Where do you suggest I put this ? May 22nd, 2013, 08:31 PM #8 Newbie Joined: May 2013 Posts: 5 Thanks: 0 Re: Discounts Quote:  Originally Posted by Denis WHY did you include that commercial link in your original post? Oh, if you are referring to the web site link then no particular reason, just thought it would give you an idea what and why I am asking Feel free to remove it, it's not important May 22nd, 2013, 10:43 PM #9 Newbie Joined: May 2013 Posts: 5 Thanks: 0 Re: Discounts Quote:  Originally Posted by johnr$9 is obviously 9/10 of $10. 1-9/10 = 1/10 or 10% Now try the harder one. OK If The original price is$ 68.65 each
An by buying 50 you get them for \$ 12.00 each
What percentage discount is this ?
And how dose one work this out on a calculator ?
Cheers

Ross

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