Question

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

Answer 1

First, we work out the increase/decrease of the two amounts

There are 52-43 = 9 projects increase 

Percentage increase = $\frac{number of increase}{original value}$×100
Percentage increase = $\frac{9}{43}$×100
Percentage increase = 21% (to the nearest integer)