There are some students in the fun fair.
310 of them are boys, of whom 30% of them do not wear spectacles.
27 of the girls do not wear spectacles. What is the percentage of the students in the fun fair who wear spectacles?
Boys |
Girls |
Total |
3x10 = 30 u |
7x10 = 70 u |
10x10 = 100 u |
No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
3x3 |
7x3 |
2x10 |
5x10 |
|
9 u |
21 u |
20 u |
50 u |
100 u |
30% =
30100=
310 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 spectacles
= 21 u + 50 u
= 71 u
Total number of students
= 9 u + 21 u + 20 u + 50 u
= 100 u
Percentage of the students in the fun fair who wear spectacles
=
71100 x 100%
= 71%
Answer(s): 71%