Jessica is collecting aluminum cans during the summer for a recycling project. She collected 120 aluminum cans in June and 150 aluminum cans in July.

What is the percentage change of the number of cans she collected in June to the number of cans she collected in July?

I believe it is a 25% increase.

Percent change = (new number - old number) / (old number) * 100

new number = 150 (in July)

old number = 120 (in June)

percent change = (150 - 120) / 120 * 100

percent change = 30/120 * 100

percent change = 0.25 * 100

percent change = 25

Answer: The percent change was 25%.

Since the percent change is a positive number, it is a percent increase.