What is 3/10 ÷ by 4/5

 ÷  equals .

First, apply this rule: a ÷  = a × . Your problem should look like:  × .
Second, apply this rule:  ×  = . Your problem should look like: .
Third, simplify 3 × 5 to get 15. Your problem should look like: .
Fourth, simplify 10 × 4 to get 40. Your problem should look like: .
Fifth, simplify. Your problem should look like:  which is the answer.

C. 2.6 gallons/4 quarts