SAT Ratios, rates, proportional relationships, and units Practice Question 13 (Medium)

Question bank / Ratios, rates, proportional relationships, and units

Math · Problem-Solving and Data AnalysisMedium

A $24$ -ounce jar of peanut butter costs $\$4.80$ , and a $32$ -ounce jar of the same peanut butter costs $\$5.76$ . How many cents less per ounce does the $32$ -ounce jar cost than the $24$ -ounce jar?

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Answer: 2

The $24$ -ounce jar costs $\frac{480}{24} = 20$ cents per ounce. The $32$ -ounce jar costs $\frac{576}{32} = 18$ cents per ounce. The larger jar costs $20 - 18 = 2$ cents less per ounce.

Answering $96$ finds the difference in total price ( $\$0.96$ ), not the difference in price per ounce.

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