Jeremy worked for 8 1/2 hours building model airplanes. If each airplanes takes him 1 2/5 hours to make how many models did he build?

Answer 1

To find out the number of models Jeremy built, we need to divide the total number of hours he worked by the time it takes him to make each model.
To add 8 1/2 hours, convert the mixed number to an improper fraction: 8 1/2 = 17/2.
Each model takes him 1 2/5 hours to make, so we'll convert this to an improper fraction as well: 1 2/5 = 7/5.
We'll divide the total number of hours by the number of hours it takes to make each model: (17/2) ÷ (7/5)
Invert the second fraction and multiply: (17/2) * (5/7) = (17 * 5) / (2 * 7) = 85/14
The answer is an improper fraction, which means Jeremy made 85/14 models.