For number one, a is 2/6 but can be simplified to 1/3 by dividing the denominator and numerator by 2. B is 3/5 and c is 12/8 but we have to turn that improper fraction into a mixed fraction so it becomes 1 4/8 which simplified is 1 1/2
If he runs for 21 hours per week, how many hours does he run per day? There are 7 days in a week, so this would be 21/7. Then if he doesn't run for three days, you need to multiply this by 3.