Answer:
$56.25
Explanation:
We can find the marked up price from the original price, given the percent mark up with the following equation:
new price = (original price) × (100% + mark up)
↓ plugging in the given values
new price = $45 × (100% + 25%)
↓ executing the addition
new price = $45 × 125%
↓ rewriting using the definition of a percent: a% = a ÷ 100
new price = $45 × 1.25
↓ executing the multiplication
new price = $56.25