80% of the students are boys. 50% of the boys and 80% of the girls wear watches. What percentage of the students do not wear watches?
| Boys |
Girls |
Total |
| 80% |
20% |
100% |
| Wear watches |
Do not wear |
Wear watches |
Do not wear |
|
| 40% |
40% |
16% |
4% |
100% |
Number of boys who wear watches
= 50% x 80%
=
50100 x 80%
= 40%
Number of girls who wear watches
= 80% x 20%
=
80100 x 20%
= 16%
Percentage of students who wear watches
= 40% + 16%
= 56%
Percentage of students who do not wear watches
= 100% - 56%
= 44%
Answer: 44%
