2012 AMC 8 Problems/Problem 8: Difference between revisions
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Revision as of 15:34, 3 July 2013
Problem
A shop advertises everything is "half price in today's sale." In addition, a coupon gives a 20% discount on sale prices. Using the coupon, the price today represents what percentage off the original price?
Solution
Apply the first discount, so the price is 
% of the original. Then apply the next 
% discount to find that the price is now 
% of the original. However, we need to find the percentage off the original price, not the current percentage of the price. We then subtract % from 
% (the original price of the item), to find the answer, 
.
See Also
| 2012 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 7 |
Followed by Problem 9 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
These problems are copyrighted © by the Mathematical Association of America. 
