In a tuckshop,
89 of the pupils wore caps. After 424 pupils who wore caps left the tuckshop, the percentage of pupils who wore caps decreased to 30%. How many pupils in the tuckshop did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
8x7 = 56 u |
1x7 = 7 u |
Change |
- 424 |
|
After |
3x1 = 3 u |
7x1 = 7 u |
30% =
30100 =
310The number of pupils who did not wear caps remains unchanged. LCM of 1 and 7 is 7.
Number of pupils who wore caps and left
= 56 u - 3 u
= 53 u
53 u = 424
1 u = 424 ÷ 53 = 8
Number of pupils who did not wear caps
= 7 u
= 7 x 8
= 56
Answer(s): 56