Percent Of Change

Question

Find the percent of change to the nearest percent for the following. State if it is an increase or a decrease.

1.  From 117 minutes to 91 minutes

Answer 1

Solution:

To calculate the percent of change:

Step 1: Calculate the change in value (subtract the old value from the new value)

Step 2: Divide the calculation in step 1 by the old value

Step 3: Convert the result to a percentage by multiplying by 100

The formula is |New Value − Old Value| /Old Value × 100

117min to 91min is a 26 minute decrease

1.  |91 – 117| = 26

2.  26/117 = .222 repeating

3.  .222 x 100 = 22.2 % decrease