Aboat is marked up 20% on the original price the original price was 50$ what is the sale price of the boat before sales tax

$62.50

Step-by-step explanation:

We can write a proportion. We know that 50 is 80% of the marked up price since it was the original price before the 20% mark up. Let's call the marked up price x. We write equal ratios of comparing percent and comparing the 50 to the marked up price. We then set them equal.

We then cross multiply across the equal sign from numerator to the opposite numerator.

80(x)=50(100)

80x=5000

We divide to find x.

x=62.5