What is 2 and 1 third minus 2 fifths?

Well, darling, to subtract 2/5 from 2 1/3, you first need to convert the mixed numbers to improper fractions. That gives you 7/3 minus 2/5. Find a common denominator, which is 15, and then do the math to get 31/15 or 2 1/15. Voila!