Question

If it takes one product inspector 60 minutes to inspect 15 products how many inspectors would be needed to inspect 165 products per hour?

Answer 1

Judging on this question I would first begin by finding the ratio between 15 and 165 products. You do this by dividing 165 by 15. You should get 1:11. You then want to multiply 60 by 11 because of the ratio, which you should get 660. 
Thus, the amount of time it would take a inspector to inspect 165 products would be 660 minutes.

Answer 2

Set up a proportion:

$\frac{1}{15} = \frac{x}{165}$

The numerator represents the amount of inspectors, and the denominator represents the amount of products inspected.

Cross multiply:

$15x = 165$

Divide both sides by 15 to get x by itself:

$x = 11$

It will take 11 inspectors to inspect 165 products an hour.