Question

Mark has 32 DVDs. His friend gives him some more.
Mark now has 40 DVDs. What is the percentage change of DVDs?

a. 80%
b. 25%
c. 125%
d. 20%
explain your working out​

Answer 1

Answer: choice B 25%

Step-by-step explanation:

First: work out the difference (increase) between the two numbers you are comparing.

Increase = New Number - Original Number

Then:  divide the increase by the original number and multiply the answer by 100.

% increase = Increase ÷ Original Number × 100.

Mark had 32 dvds now he has 40

so

$\frac{40-32}{32}=0.25$

so the percentage change is 25%