A number increases from 30 to 40 and then decreases from 40 to 30. Compare the percent of increase from 30 to 40 and that of the decrease from 40 to 30.

To compare the percent of increase from 30 to 40 and the percent of decrease from 40 to 30, we need to calculate the percentage change for each scenario.

Percent Increase:
The initial value is 30, and it increases to 40. The difference between the final value and the initial value is 40 - 30 = 10.

Percentage increase = (Change / Initial value) * 100
= (10 / 30) * 100
≈ 33.33%

Percent Decrease:
The initial value is 40, and it decreases to 30. The difference between the initial value and the final value is 40 - 30 = 10.

Percentage decrease = (Change / Initial value) * 100
= (10 / 40) * 100
= 25%

Comparing the percentages, we find that the percent of increase from 30 to 40 (33.33%) is higher than the percent of decrease from 40 to 30 (25%).