Difference between revisions of "2009 AMC 10A Problems/Problem 7"
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Revision as of 10:55, 4 July 2013
Problem
A carton contains milk that is 
% fat, an amount that is 
% less fat than the amount contained in a carton of whole milk. What is the percentage of fat in whole milk?
Solution
Rewording the question, basically we are being asked "2 is 40% less than what number?"
If x represents the number we are looking for, then 40% less than the number would be represented by 
or 
.
Thus 
; solving for x, we get 
, 
See also
| 2009 AMC 10A (Problems • Answer Key • Resources) | ||
| Preceded by Problem 6 |
Followed by Problem 8 | |
| 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 AMC 10 Problems and Solutions | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
