One ninth plus five sixths

5/9 + 1/6

First find the common denominator

You can multiply both the 9 and the 6 to make 18. (9x2) (6x3)

Because you multiply the denominator, you also have to multiple the numerator.

5x2=10 and 1x3=3

You now have 10/18 + 3/18

Now add the numerator

10+3=13

Your answer to the added numerator goes over the common denominator.

13/18.