Question

A man is `66 5/12` inches tall and his son is `58 8/9` inches tall. How much taller is the man?

Answer 1

`7 19/32`inches

Explanation:

Change the fractions to have common denominators.

Common to 12 and 9 is 36, which you get by multiplying by 3/3 and 4/4 respectively, resulting in `15/36` and `32/36`.

But you can't take `32/36` from `15/36` so take 1" from the man's height, change it to `36/36` and add it to the `15/36` to get `51/36`.

Now you can subtract. `51/36`-`32/36` = `19/36`

66" - 1" - 58" = 7"