Sam finished 18 problems in one hour. How many hours will it take same to solve 80 problems

Sam finished 18 problems in one hour. How many hours will it take same to solve 80 problems

Set up a proportion of problems to hours where h is the number of hours for 80 problems:
18/1 = 80/h

To solve for h, we type this proportion into our search engine and we get:
h = 4.44