Bill plays ball for 9 hours each week. His friend Mark spends as much time playing ball. Who plays more ball?

I think I have to divide. So I think Mark plays more ball by 10 4/5 hours. Is this correct? Thank you so very much for your help Ms. Sue.

2 answers

You're welcome, Alice.

I think you left something out of your problem. How much time does Mark spend playing ball?
You later posted: "Oops! Mark spends 5/6 as much time playing ball."

(5/6) * 9 = 45/6 = 7 1/2 hours

Bill spends 1 1/2 hours more playing ball each week.