51.
a. Robert finds a shirt on a sale rack. All items on the rack are 40% off. The price on
his shirt is missing. When the clerk scans the bar code, he tells Robert that the
sale price of the shirt is $18. What percent of the original price is $18?
b. Set up a proportion to find the original price of the shirt.
c. Copy and complete the model below and explain how it helps you to solve this
problem in another way.