Raquel's younger sister is 3 5/6 feet tall. Raquel's brother is 4 1/6 feet tall. How much taller is Raquel's brother than her sister?

We must subtract 3 5/6 from 4 1/6 so we write:


4 1/6 - 3 5/6.

By subtracting only the whole number parts we get 4ft - 3ft which leaves us with

1 1/6  -  5/6


Now we convert 1 1/6 as follows...

1 1/6 = 1+1/6 = 6/6 +1/6 = 7/6


Now we can subtract:


7/6 - 5/6 = 2/6 = 1/3