In a canteen,
38 of the children wore caps. After 28 children who wore caps left the canteen, the percentage of children who wore caps decreased to 20%. How many children in the canteen did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
3x4 = 12 u |
5x4 = 20 u |
Change |
- 28 |
|
After |
1x5 = 5 u |
4x5 = 20 u |
20% =
20100 =
15The number of children who did not wear caps remains unchanged. LCM of 5 and 4 is 20.
Number of children who wore caps and left
= 12 u - 5 u
= 7 u
7 u = 28
1 u = 28 ÷ 7 = 4
Number of children who did not wear caps
= 20 u
= 20 x 4
= 80
Answer(s): 80