There are some pupils in the fun fair.
15 of them are boys, of whom 75% of them do not wear spectacles.
34 of the girls do not wear spectacles. What is the percentage of the pupils in the fun fair who do not wear spectacles?
| Boys |
Girls |
Total |
1x4 =
4 u |
4x4 =
16 u |
5x4 =
20 u |
| No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
| 3x1 |
1x1 |
3x4 |
1x4 |
|
| 3 u |
1 u |
12 u |
4 u |
20 u |
75% =
75100=
34 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 4 is 4.
Number of pupils who do not wear spectacles
= 3 u + 12 u
= 15 u
Total number of pupils
= 3 u + 1 u + 12 u + 4 u
= 20 u
Percentage of the pupils in the fun fair who do not wear spectacles
=
1520 x 100%
= 75%
Answer(s): 75%
