Answer :

iGreen
First we subtract it:

18 - 15 = 3

Now we divide it to the original:

3 / 15 = 0.2

Multiply by 100:

0.2 * 100 = 20%

Answer:

20%

Step-by-step explanation:

percent of change = amount of change/original amount

First, subtract (to get the amount of change) 18 - 15 = 3

Plug numbers in according to the formula above 3/15

Simplify 1/5

1/5 x 100 = 100/5

Divide: 20

The answer is 20%

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