Okay so first what you would do is figure out what 3/5 is as a decimal so you would divide 3 by 5 which is 0.6 so the percentage is 15.6%
Next turn it into a fraction which would be 15.6/1
Then multiply the numerator and denominator by 10
15.6= 15.6/1= 156/10
then to put it in simplest form divide 10 by 156 and that would be 15 and 6/10
hope this helped (;