Answer:
Number 7 is 25%
Step-by-step explanation:
You take the original price and subtract it by each percentage until you get 30.
$40.00 - 15% = 34
$40.00 - 20% = 32
$40.00 - 40% = 24
$40.00 - 25% = 30
Therefore, the answer is 25% !
Hoped this helped you! :D
