What is the sum of 1 over 9 2 over 3 and 5 over 18?

First put the fractions in forms that have a common denominator:

(1/9) + (2/3) + (5/18) = (2/18) + (12/18) + (5/18)

Then just add the numerators:

(2/18) + (12/18) + (5/18) = 19/18

You might be able to simplify the fraction in some cases, but not this time.