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# [Smart Math] Percentages Problem 9

Here’s and example of a SMART MATH problem for PERCENTAGES. ### Problem

With the profit margin increased, a traders earns 25% more than before. If his earnings now are $800 per month, what was it before? 1.$600
2. $625 3.$640
4. $675 5.$720

### The Usual Method

Let the earning of the trader initially be $x. With an increase in the margins, the earning is now$1.25x
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