Question

The number 40 is decreased to 39. What is the percentage by which the number was decreased, to the nearest tenth of a percent?

Answer 1

2.5%

Explanation:

The percent change is found by ...

((new value)/(old value) -1)×100% = (39/40 -1)×100% = -2.5%

The change to 39 represents a 2.5% decrease.