80% of the students are girls. 50% of the girls and 60% of the boys wear glasses. What percentage of the students do not wear glasses?
| Girls |
Boys |
Total |
| 80% |
20% |
100% |
| Wear glasses |
Do not wear |
Wear glasses |
Do not wear |
|
| 40% |
40% |
12% |
8% |
100% |
Number of girls who wear glasses
= 50% x 80%
=
50100 x 80%
= 40%
Number of boys who wear glasses
= 60% x 20%
=
60100 x 20%
= 12%
Percentage of students who wear glasses
= 40% + 12%
= 52%
Percentage of students who do not wear glasses
= 100% - 52%
= 48%
Answer: 48%
