Question 773955
67 7/12 = 811/12
60 7/9 = 547/9
811/12 - 547/9
Common Denominator = 36
(3 *811 - 4 *547)/36
(2433 - 2188)/36
= 245/36
= 6 29/36 inches taller
than his son.
Hope this helps.
:-)