There are some pupils in the zoo.
110 of them are boys, of whom 30% of them do not wear spectacles.
49 of the girls do not wear spectacles. What is the percentage of the pupils in the zoo who wear spectacles?
| Boys |
Girls |
Total |
1x10 =
10 u |
9x10 =
90 u |
10x10 =
100 u |
| No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
| 3x1 |
7x1 |
4x10 |
5x10 |
|
| 3 u |
7 u |
40 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 1 and 10 is 10.
Number of pupils who wear spectacles
= 7 u + 50 u
= 57 u
Total number of pupils
= 3 u + 7 u + 40 u + 50 u
= 100 u
Percentage of the pupils in the zoo who wear spectacles
=
57100 x 100%
= 57%
Answer(s): 57%
