1/16 inch , 5/16 inch , 3/8 inch , 1/2 inch , 1/8 inch , 1/4 inch
let's take as a common denominator 16, hence:
1/16 =1/16
5/16=5/16
3/8 = 6/16
1/2 = 8/16
1/4 = 4/16
so the smaller fraction is the one that has a smaller NUMERATOR:
1/16 , 4/16, 5/16, 6/16 , 8/16 or in simplifying each term again:
1/16, 1/4 , 5/16, 3/8 , 1/2