2014 AMC 10B Problems/Problem 7
Contents
[hide]Problem
Suppose and A is % greater than . What is ?
Solution
We have that A is greater than B, so . We solve for . We get
.
Solution 2
The question is basically asking the percentage increase from to . We know the formula for percentage increase is . We know the new is and the original is . We also must multiple by to get out of it's fractional/decimal form. Therefore, the answer is or .
Solution 3 (Answer Choices)
Without loss of generality, let and forcing to be . Plugging our values for and into these answer choices, we find that only returns .
Video Solution (CREATIVE THINKING)
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Video Solution
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See Also
2014 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 6 |
Followed by Problem 8 | |
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All AMC 10 Problems and Solutions |
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