60% of the students are boys. 70% of the boys and 80% of the girls wear watches. What percentage of the students do not wear watches?
| Boys |
Girls |
Total |
| 60% |
40% |
100% |
| Wear watches |
Do not wear |
Wear watches |
Do not wear |
|
| 42% |
18% |
32% |
8% |
100% |
Number of boys who wear watches
= 70% x 60%
=
70100 x 60%
= 42%
Number of girls who wear watches
= 80% x 40%
=
80100 x 40%
= 32%
Percentage of students who wear watches
= 42% + 32%
= 74%
Percentage of students who do not wear watches
= 100% - 74%
= 26%
Answer: 26%
