To find the number of model airplanes Jeremy built, we need to divide the total number of hours he worked (8 1/2 hours) by the time it takes him to make each airplane (1 2/5 hours).
First, we need to convert 8 1/2 hours to an improper fraction.
8 1/2 = 16/2 + 1/2 = 17/2
We can now divide 17/2 (hours Jeremy worked) by 7/5 (hours it takes him to make each airplane).
(17/2) ÷ (7/5) = 17/2 × 5/7 = (17 × 5)/(2 × 7) = 85/14
Therefore, Jeremy built a total of 85/14 model airplanes.
Jeremy worked for 8 1/2 hours building model airplanes. If each airplane takes him 1 2/5 hours to make, how many models did he build? HELP
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