In a tuckshop,
34 of the girls wore spectacles. After 48 girls who wore spectacles left the tuckshop, the percentage of girls who wore spectacles decreased to 45%. How many girls in the tuckshop did not wear spectacles?
| |
Wore spectacles |
Did not wear spectacles |
| Before |
3x11 =
33 u |
1x11 =
11 u |
| Change |
- 48 |
|
| After |
9x1 =
9 u |
11x1 =
11 u |
45% =
45100 =
920The number of girls who did not wear spectacles remains unchanged. LCM of 1 and 11 is 11.
Number of girls who wore spectacles and left
= 33 u - 9 u
= 24 u
24 u = 48
1 u = 48 ÷ 24 = 2
Number of girls who did not wear spectacles
= 11 u
= 11 x 2
= 22
Answer(s): 22
