In a tuckshop,
56 of the children wore spectacles. After 84 children who wore spectacles left the tuckshop, the percentage of children who wore spectacles decreased to 60%. How many children in the tuckshop did not wear spectacles?
| |
Wore spectacles |
Did not wear spectacles |
| Before |
5x2 =
10 u |
1x2 =
2 u |
| Change |
- 84 |
|
| After |
3x1 =
3 u |
2x1 =
2 u |
60% =
60100 =
35The number of children who did not wear spectacles remains unchanged. LCM of 1 and 2 is 2.
Number of children who wore spectacles and left
= 10 u - 3 u
= 7 u
7 u = 84
1 u = 84 ÷ 7 = 12
Number of children who did not wear spectacles
= 2 u
= 2 x 12
= 24
Answer(s): 24
