There are some students in the bird park.
110 of them are boys, of whom 80% of them do not wear spectacles.
19 of the girls do not wear spectacles. What is the percentage of the students in the bird park who wear spectacles?
Boys |
Girls |
Total |
1x5 = 5 u |
9x5 = 45 u |
10x5 = 50 u |
No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
4x1 |
1x1 |
1x5 |
8x5 |
|
4 u |
1 u |
5 u |
40 u |
50 u |
80% =
80100=
45 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 5 is 5.
Number of students who wear spectacles
= 1 u + 40 u
= 41 u
Total number of students
= 4 u + 1 u + 5 u + 40 u
= 50 u
Percentage of the students in the bird park who wear spectacles
=
4150 x 100%
= 82%
Answer(s): 82%