Question

The rain caused the river to rise a total of 6 2/3 inches. The river was rising at an average of 2/3 of an dinch each hour. How many hours didi it rain?

Answer 1

the answer is 6, I think

Answer 2

6 2/3 divided by 2/3 is 20/3 * 3/2 = 60/6 = 10 hours

I used the trick that dividing two fractions is the same as multiplying by the inverse. (ie., divide by 2/3 is like multiplying with 3/2)