Penny reads 12 pages in 1/2 hour. what is the unit rate for pages per hour? for hours per page

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

For each proportion find the unknown number x 1/5/8=×/15