There are some students in the bird park.
310 of them are boys, of whom 20% of them do not wear spectacles.
37 of the girls do not wear spectacles. What is the percentage of the students in the bird park who wear spectacles?
| Boys |
Girls |
Total |
3x5 =
15 u |
7x5 =
35 u |
10x5 =
50 u |
| No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
| 1x3 |
4x3 |
3x5 |
4x5 |
|
| 3 u |
12 u |
15 u |
20 u |
50 u |
20% =
20100=
15 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 5 is 15.
Number of students who wear spectacles
= 12 u + 20 u
= 32 u
Total number of students
= 3 u + 12 u + 15 u + 20 u
= 50 u
Percentage of the students in the bird park who wear spectacles
=
3250 x 100%
= 64%
Answer(s): 64%
