There are some students in the school hall.
25 of them are girls, of whom 10% of them do not wear glasses.
23 of the boys do not wear glasses. What is the percentage of the students in the school hall who wear glasses?
Girls |
Boys |
Total |
2x5 = 10 u |
3x5 = 15 u |
5x5 = 25 u |
No glasses |
Glasses |
No glasses |
Glasses |
|
1x1 |
9x1 |
2x5 |
1x5 |
|
1 u |
9 u |
10 u |
5 u |
25 u |
10% =
10100=
110 The number of girls is the repeated identity. Make the number of girls the same. LCM of 2 and 10 is 10.
Number of students who wear glasses
= 9 u + 5 u
= 14 u
Total number of students
= 1 u + 9 u + 10 u + 5 u
= 25 u
Percentage of the students in the school hall who wear glasses
=
1425 x 100%
= 56%
Answer(s): 56%