In order to solve this problem you need to keep change flip. You keep the first term (3/5) the same. Then you change the sign from division to multiplication then flip the 3/15 so its 15/3. Then you can simplify because the 5 and 15 share a factor (5). You can do the same things with the 3's. This the problem is now 1/1 * 3/1 which means the answer is 3 :) hope this helped