There are some students in the fun fair.
310 of them are boys, of whom 70% of them do not wear glasses.
27 of the girls do not wear glasses. What is the percentage of the students in the fun fair who wear glasses?
| Boys |
Girls |
Total |
3x10 =
30 u |
7x10 =
70 u |
10x10 =
100 u |
| No glasses |
Glasses |
No glasses |
Glasses |
|
| 7x3 |
3x3 |
2x10 |
5x10 |
|
| 21 u |
9 u |
20 u |
50 u |
100 u |
70% =
70100=
710 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 10 is 30.
Number of students who wear glasses
= 9 u + 50 u
= 59 u
Total number of students
= 21 u + 9 u + 20 u + 50 u
= 100 u
Percentage of the students in the fun fair who wear glasses
=
59100 x 100%
= 59%
Answer(s): 59%
