Answer :

17/5 = 5/5 + 5/5 + 5/5 + 2/5 = 3 + 2/5

The simplest mixed number for 17/5 is 3  2/5.
how I find it is: I look to see how many times 5 goes into 17 and I got 5 goes into 17 three times. therefore 3 is my big number. then I notice that there are two left over. then I look at the original numerator which is 5. so the answer is 3 2/5