Problem:
Brynn's savings decreased by in July, then increased by in August. Brynn's savings are now what percent of the original amount?
Answer Choices:
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Solution:
For simplicity, suppose that Brynn started with of savings. In July, the savings decrease by , so the savings now become . In August, the savings increase by , so the savings now become . Since we started with , if the final savings are , Brynn's savings are now of the original amount.
The problems on this page are the property of the MAA's American Mathematics Competitions