GRE Problem Solving Question 136
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Source: OG2
During a one-year study, biologists observed the number of fish in a certain pond as well as the percent of the fish that were catfish. At the beginning of the year, there were 300 fish in the pond, of which 15 percent were catfish; and at the end of the year, there were 400 fish in the pond, of which 10 percent were catfish. From the beginning of the year to the end of the year, the number of catfish in the pond
- A decreased by more than 5%
- B decreased by 5%
- C did not change
- D increased by 5%
- E increased by more than 5%