Question

Scores on a college entrance exam rose from 20.1 in 1977 to 20.6 in 1986. What percent increase is this?

What is the percent of increase?
(Dound to the nearest tenth

Answer 1

2.5% change when rounded to the nearest tenth

Explanation:

The Formula for measuring change over time:

P=N−O/O⋅100

P is the percent change

N is the New Value - 20.6 for this problem

O is the Old Value = 20.1 for this problem

First subtract the new value from the old value (you should get 0.5)

Then, divide that number by the old value (you chould get a really long decimal)

Then, multiply that number by 100 (You should get a number like 2.48756 etc.)

Lastly, round it up to the nearest tenth (2.5)