In a tuckshop,
23 of the pupils wore caps. After 14 pupils who wore caps left the tuckshop, the percentage of pupils who wore caps decreased to 20%. How many pupils in the tuckshop did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
2x4 = 8 u |
1x4 = 4 u |
Change |
- 14 |
|
After |
1x1 = 1 u |
4x1 = 4 u |
20% =
20100 =
15The number of pupils who did not wear caps remains unchanged. LCM of 1 and 4 is 4.
Number of pupils who wore caps and left
= 8 u - 1 u
= 7 u
7 u = 14
1 u = 14 ÷ 7 = 2
Number of pupils who did not wear caps
= 4 u
= 4 x 2
= 8
Answer(s): 8