Question

Shelley’s pet food store sold one customer 5 peanut butter biscuits for $3. She sold another customer 7 beef treats for $4.20.

Write a proportion that compares the sales of these two items, and find the cross products.

Answer 1

21

Explanation:

cross multiply

Answer 2

5/3 = 7/4.2
cross multiply
(3)(7) = (5)(4.2)
21 = 21 (correct)...this is a true proportion