There are some students in the school hall.
110 of them are girls, of whom 20% of them do not wear spectacles.
19 of the boys do not wear spectacles. What is the percentage of the students in the school hall who wear spectacles?
Girls |
Boys |
Total |
1x5 = 5 u |
9x5 = 45 u |
10x5 = 50 u |
No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
1x1 |
4x1 |
1x5 |
8x5 |
|
1 u |
4 u |
5 u |
40 u |
50 u |
20% =
20100=
15 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 5 is 5.
Number of students who wear spectacles
= 4 u + 40 u
= 44 u
Total number of students
= 1 u + 4 u + 5 u + 40 u
= 50 u
Percentage of the students in the school hall who wear spectacles
=
4450 x 100%
= 88%
Answer(s): 88%