Answer:
20%
Step-by-step explanation:
A pair of jeans cost $45 before the sale.
The sale is taking $9 off of the original price.
Then
$45 - 100%
$9 - x%
Write a proportion:

Cross multiply:

Answer:
20 ft²
Step-by-step explanation:
the area (A) of a triangle is calculated using the formula
A =
bh ( b is the base and h the height )
here b = 5 and h = 8
A =
× 5 × 8 = 20 ft²