There are some students in the fun fair.
710 of them are girls, of whom 20% of them do not wear glasses.
23 of the boys do not wear glasses. What is the percentage of the students in the fun fair who wear glasses?
Girls |
Boys |
Total |
7x5 = 35 u |
3x5 = 15 u |
10x5 = 50 u |
No glasses |
Glasses |
No glasses |
Glasses |
|
1x7 |
4x7 |
2x5 |
1x5 |
|
7 u |
28 u |
10 u |
5 u |
50 u |
20% =
20100=
15 The number of girls is the repeated identity. Make the number of girls the same. LCM of 7 and 5 is 35.
Number of students who wear glasses
= 28 u + 5 u
= 33 u
Total number of students
= 7 u + 28 u + 10 u + 5 u
= 50 u
Percentage of the students in the fun fair who wear glasses
=
3350 x 100%
= 66%
Answer(s): 66%