There are some pupils in the zoo.
310 of them are boys, of whom 40% of them do not wear spectacles.
67 of the girls do not wear spectacles. What is the percentage of the pupils in the zoo who wear spectacles?
| Boys |
Girls |
Total |
3x5 =
15 u |
7x5 =
35 u |
10x5 =
50 u |
| No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
| 2x3 |
3x3 |
6x5 |
1x5 |
|
| 6 u |
9 u |
30 u |
5 u |
50 u |
40% =
40100=
25 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 5 is 15.
Number of pupils who wear spectacles
= 9 u + 5 u
= 14 u
Total number of pupils
= 6 u + 9 u + 30 u + 5 u
= 50 u
Percentage of the pupils in the zoo who wear spectacles
=
1450 x 100%
= 28%
Answer(s): 28%
