If you divide the numerator by the denominator using a calculator, you will be able to see the values in a more numerical fashion and organize them from there.
for example, for part a, 3 divided by 5 = 0.6 1 divided by 6 = 1.666 2 divided by 3 = 0.666
meaning your answer would be 3/5, 2/3, and 1/6 if arranged in increasing order.