There are some pupils in the theme park.
14 of them are boys, of whom 80% of them do not wear glasses.
23 of the girls do not wear glasses. What is the percentage of the pupils in the theme park who do not wear glasses?
| Boys |
Girls |
Total |
1x5 =
5 u |
3x5 =
15 u |
4x5 =
20 u |
| No glasses |
Glasses |
No glasses |
Glasses |
|
| 4x1 |
1x1 |
2x5 |
1x5 |
|
| 4 u |
1 u |
10 u |
5 u |
20 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 pupils who do not wear glasses
= 4 u + 10 u
= 14 u
Total number of pupils
= 4 u + 1 u + 10 u + 5 u
= 20 u
Percentage of the pupils in the theme park who do not wear glasses
=
1420 x 100%
= 70%
Answer(s): 70%
