You work 1.15 hours on your English Homework and 1.75 hours in your math homework. Your science homework takes 1.05 hours less than your math homework. How many more hours do you work on your homework?

1.75 - 1.05 = 0.70 since the science homework takes 1.05 hours less.

You then add 1.15 + 1.75 + 1.05 = 3.95 so you get your total of hours in homework so the answer is 4. You have to round because there are only 60 minutes in an hour.