
percentage
In a survey, it is found that 567 pupils, represening 42% of the total srength of a school come by school bus. If 4% come by car, 540 come on foot and rest use their bicycles find:
1 the total strength of the school.
2 the percentage of pupils using their bicycles.

1.
42% of strength is 567
1% of strength is $\displaystyle \frac{567}{42}=13.5$
100% of strength is $\displaystyle 13.5 \times 100 = 1350$

2.
On foot $\displaystyle \frac{540}{1350} \times 100 = 40$%
On bicycle 100  40  42  4 = 14%
14% $\displaystyle 1350 \times 0.14 = 13.5 \times 14 = 189$