How do you divide six and two thirds by three and three fifths?

First change 6 2/3 to an improper fraction which would be 20/3. Then change 3 3/5 to 18/3. 20/3 divided by 18/3 is the same as multiplying 20/3 times 3/18. That is equal to 60/54, or 10/9, or 1 1/9.