There are 36 students in a class. 1/3 of the students go to school by bus. 1/4 of the students walk to school, the rest are taken to school by their parents. How many students are taken to school by their parents?

Answer 1

36 * 1/3 = 36/3 = 12

36 * 1/4 = 36/4 = 9

36 - 12 - 9 = ?

Answer 2

by bus ---> (1/3) of 36 = 12
walkers ---> (1/4) of 36 = 9

how many are left over ??