80% of the pupils are girls. 60% of the girls and 70% of the boys wear hats. What percentage of the pupils do not wear hats?
| Girls |
Boys |
Total |
| 80% |
20% |
100% |
| Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
| 48% |
32% |
14% |
6% |
100% |
Number of girls who wear hats
= 60% x 80%
=
60100 x 80%
= 48%
Number of boys who wear hats
= 70% x 20%
=
70100 x 20%
= 14%
Percentage of pupils who wear hats
= 48% + 14%
= 62%
Percentage of pupils who do not wear hats
= 100% - 62%
= 38%
Answer: 38%
