How do you subtract mixed fractions with uncommon denominators?

Answer 1

Make it to a improper fraction first.

e.g.

1) 3 and 2/3 - 2 and 1/4

-> 11/3 - 9/4

->the Least Common Multiple of 3 and 4 is 12

so

-> (44-27)/12

->17/12

Change it back to a mixed fraction if you want.

Answer 2

You must first convert the fractions to equivalent improper fractions with a common denominator.