What is 3 1/3 minus 2 2/5

First, make the fractions unsimplified

10/3 and 12/5

Then, you need common denominators. Because it is the least common multiple, make the denominators 15 by multiplying the numerator and denominator of 10/3 by 5. Make the denominator 15 by multiplying the numerator and denominator of 12/5 by 3.

Your new fractions will be 50/15 and 36/15

Subtract

50/15-36/15=14/15.