There are some students in the fun fair.
310 of them are boys, of whom 60% of them do not wear watches.
57 of the girls do not wear watches. What is the percentage of the students in the fun fair who wear watches?
Boys |
Girls |
Total |
3x5 = 15 u |
7x5 = 35 u |
10x5 = 50 u |
No watches |
Watches |
No watches |
Watches |
|
3x3 |
2x3 |
5x5 |
2x5 |
|
9 u |
6 u |
25 u |
10 u |
50 u |
60% =
60100=
35 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 5 is 15.
Number of students who wear watches
= 6 u + 10 u
= 16 u
Total number of students
= 9 u + 6 u + 25 u + 10 u
= 50 u
Percentage of the students in the fun fair who wear watches
=
1650 x 100%
= 32%
Answer(s): 32%