In a week, the Robinson family drink 9/2 bottles of orange juice and the Chan family drink 3 4/5 bottles of orange juice. How many more bottles of orange juice do the Robinson family drink than the Chan family?

1 answer

First, let's convert 3 4/5 to an improper fraction:
3 4/5 = (5*3 + 4)/5 = 15/5 + 4/5 = 19/5

The Robinson family drinks 9/2 = 4.5 bottles of orange juice in a week.
The Chan family drinks 19/5 = 3.8 bottles of orange juice in a week.

The Robinson family drinks 4.5 - 3.8 = 0.7 more bottles of orange juice than the Chan family in a week.

Therefore, the Robinson family drinks 0.7 more bottles of orange juice than the Chan family.