I don't know what 3 3/5 + 4 4/15 equals

Answer: 7 13/15!

Explanation: First, you have to add 3 and 4 so you get 7, than find the gcf and put it as the denominator for both (3/5 = 3/15 and 4/15=4/15) ! Than divide, 15 divided by 1 is 15! Now whatever you do to the bottom, do to the top! Do it for the rest than add the numerators than you should get your answer which is 7 13/15!

7 12/15

or as a decimal: 7.8

Step-by-step explanation:

first you need to find the common denominator

3 9/15 + 4 4/15

then add

= 7 12/15