What is 20% of $60?

20% is 20/100 mutiplied by $60:

20% × $60 =

20
100

× $60 = 0.2 × $60 = $12
$12 is what percent of $60?

$12 is divided by $60 and multiplied by 100%:

$12
$60

× 100% = 20%
$12 is 20% of what?

$12 is divided by 20%:

$12
20%

=
$12
20

× 100 = $60
What is the percentage change from $40 to $50?

The difference between $50 and $40 is divided by $40 and multiplied by 100%:

$50 - $40
$40

× 100% = 0.25 × 100% = 25%