Put these rational numbers in order:
3(squared), 1 3/2, 2.2, -2
Put these rational numbers in order:
3/8, 1/4, 7/8
1 3/2 is bogus. Mixed numbers do not generally have a fractional part greater than 1.
Anyway,
3^2 = 9
1 3/2 = 5/2 = 2.5
and now it should be clear.
Do the others by putting them all over a common denominator (8), and then just sort the numerators.