70% of the students are girls. 40% of the girls and 50% of the boys wear hats. What percentage of the students do not wear hats?
| Girls |
Boys |
Total |
| 70% |
30% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 28% |
42% |
15% |
15% |
100% |
Number of girls who wear hats
= 40% x 70%
=
40100 x 70%
= 28%
Number of boys who wear hats
= 50% x 30%
=
50100 x 30%
= 15%
Percentage of students who wear hats
= 28% + 15%
= 43%
Percentage of students who do not wear hats
= 100% - 43%
= 57%
Answer: 57%
