60% of the pupils are girls. 40% of the girls and 50% of the boys wear spectacles. What percentage of the pupils do not wear spectacles?
| Girls |
Boys |
Total |
| 60% |
40% |
100% |
| Wear spectacles |
Do not wear |
Wear spectacles |
Do not wear |
|
| 24% |
36% |
20% |
20% |
100% |
Number of girls who wear spectacles
= 40% x 60%
=
40100 x 60%
= 24%
Number of boys who wear spectacles
= 50% x 40%
=
50100 x 40%
= 20%
Percentage of pupils who wear spectacles
= 24% + 20%
= 44%
Percentage of pupils who do not wear spectacles
= 100% - 44%
= 56%
Answer: 56%
