problem solving

Question

there are 45 pupils in a class 1/9 travel to school by train. 2/5 travel by car. 2/9 travel by bus. The rest walk to schoo.

how many walk

Answer 1

1/9 + 2/5 + 2/9 

= 5/45 + 18/45 + 10/45

= 33/45 of the students do not walk.

This leaves 12/45 that walk.

Your question is: What is 12/45 of 45?

 

(12/45)(45) = 12 students walk