There are some students in the school hall.
15 of them are boys, of whom 60% of them do not wear spectacles.
34 of the girls do not wear spectacles. What is the percentage of the students in the school hall who wear spectacles?
Boys |
Girls |
Total |
1x5 = 5 u |
4x5 = 20 u |
5x5 = 25 u |
No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
3x1 |
2x1 |
3x5 |
1x5 |
|
3 u |
2 u |
15 u |
5 u |
25 u |
60% =
60100=
35 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 5 is 5.
Number of students who wear spectacles
= 2 u + 5 u
= 7 u
Total number of students
= 3 u + 2 u + 15 u + 5 u
= 25 u
Percentage of the students in the school hall who wear spectacles
=
725 x 100%
= 28%
Answer(s): 28%