90% of the students are girls. 30% of the girls and 70% of the boys wear glasses. What percentage of the students do not wear glasses?
Girls |
Boys |
Total |
90% |
10% |
100% |
Wear glasses |
Do not wear |
Wear glasses |
Do not wear |
|
27% |
63% |
7% |
3% |
100% |
Number of girls who wear glasses
= 30% x 90%
=
30100 x 90%
= 27%
Number of boys who wear glasses
= 70% x 10%
=
70100 x 10%
= 7%
Percentage of students who wear glasses
= 27% + 7%
= 34%
Percentage of students who do not wear glasses
= 100% - 34%
= 66%
Answer: 66%