Question

Corrina can finish 30 algebra problems per hour. Her weeklong homework assignment includes a total of 150 problems, and she has already finished 90 of them. How many more hours will it take her to finish the algebra problems?
BTW: I need to know how to set up the proportion............ and the answer.
plz, plz, plz, help!!!!!!!!!!!

Answer 1

No of hours required = Problems left / Rate of solving

= (150 - 90)/30

= 2 Hours