70% of the students are boys. 30% of the boys and 40% of the girls wear hats. What percentage of the students do not wear hats?
Boys |
Girls |
Total |
70% |
30% |
100% |
Wear hats |
Do not wear |
Wear hats |
Do not wear |
|
21% |
49% |
12% |
18% |
100% |
Number of boys who wear hats
= 30% x 70%
=
30100 x 70%
= 21%
Number of girls who wear hats
= 40% x 30%
=
40100 x 30%
= 12%
Percentage of students who wear hats
= 21% + 12%
= 33%
Percentage of students who do not wear hats
= 100% - 33%
= 67%
Answer: 67%