At one farmer’s market, bananas cost $0.80 per pound. At another farmer’s market, bananas are sold in 5-pound bags for $4.50 per bag. Which explains how to find the better buy?
Answer
A
Divide 4.50 by 5 to find the unit rate for the 5-pound bag, and compare that number to $0.80 per pound.
B
Divide 0.80 by 5 to find the unit rate for the 5-pound bag, and compare that number to $0.80 per pound.
C
Multiply 4.50 by 5 to find the cost for 5 pounds, and compare to $4.50 per bag.
D
Multiply 4.50 by 0.80 to find the cost for 5 pounds, and compare to $4.50 per bag.
Explanation
To compare the prices fairly, find the cost per pound of the 5-pound bag by dividing its price by its weight: $4.50 ÷ 5 = $0.90 per pound. Compare $0.90 per pound with the other market’s $0.80 per pound; the $0.80 price is lower, so the first market is the better buy. Choice A describes this comparison.
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