In a parade square,
89 of the girls wore spectacles. After 184 girls who wore spectacles left the parade square, the percentage of girls who wore spectacles decreased to 25%. How many girls in the parade square did not wear spectacles?
| |
Wore spectacles |
Did not wear spectacles |
| Before |
8x3 =
24 u |
1x3 =
3 u |
| Change |
- 184 |
|
| After |
1x1 =
1 u |
3x1 =
3 u |
25% =
25100 =
14The number of girls who did not wear spectacles remains unchanged. LCM of 1 and 3 is 3.
Number of girls who wore spectacles and left
= 24 u - 1 u
= 23 u
23 u = 184
1 u = 184 ÷ 23 = 8
Number of girls who did not wear spectacles
= 3 u
= 3 x 8
= 24
Answer(s): 24
