In a parade square,
19 of the children wore spectacles. After 132 children who wore spectacles entered the parade square, the percentage of children who wore spectacles increased to 60%. How many children in the parade square did not wear spectacles?
| |
Wore spectacles |
Did not wear spectacles |
| Before |
1x1 =
1 u |
8x1 =
8 u |
| Change |
+ 132 |
|
| After |
3x4 =
12 u |
2x4 =
8 u |
60% =
60100 =
35The number of children who did not wear spectacles remains unchanged. LCM of 8 and 2 is 8.
Number of children who wore spectacles and left
= 12 u - 1 u
= 11 u
11 u = 132
1 u = 132 ÷ 11 = 12
Number of children who did not wear spectacles
= 8 u
= 8 x 12
= 96
Answer(s): 96
