Question

1. Michelle purchased 25 audio files in January. In February she

purchased 40 audio files. Find the percent increase. (Lesson 5.1)

Answer 1

Michelle purchased 25 audio files in January. The percent increase is 60%

Solution:

Given Data:

Michelle purchases = 25 audio files in January

Again purchased = 40 audio files in February

We need to find the percent increase for the given data.

Step 1:

Use the formula for percent change ,

`=\frac{\text { amount of change }}{\text { original amount. }}`

Step 2:

First we find the amount of change from the question.

Amount of change = 40 – 25

By subtracting, we get 15.

Step 3:

substitute the values in formula we get,

Formula percent change =
`(15)/(25)` = 0.6

Percent = 0.6
`*` 100 = 60 %.

Result:

Michelle purchased 25 audio files in January. And In February she purchased 40 audio files. Hence the percent increase is 60%.