Last year there were 43 science projects submitted by students at a science fair. this year there are 52 science projects. to the nearest tenth, what is the percent of change in the number of science projects submitted?

The formula for percentage increase is the increase in the original value. Between last year and this year, there was an increase of 9 science projects, so the increase = 9. The original number of science projects = 43.

9 divided by 43 = 0.2093, about. Multiply it by 100 to get it as a percentage: 20.93%

Since the problem requests it rounded to the nearest tenth, the percent change in the number of projects submitted is 20.9%.