There are some pupils in the theme park.
310 of them are boys, of whom 80% of them do not wear glasses.
47 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 |
3x5 = 15 u |
7x5 = 35 u |
10x5 = 50 u |
No glasses |
Glasses |
No glasses |
Glasses |
|
4x3 |
1x3 |
4x5 |
3x5 |
|
12 u |
3 u |
20 u |
15 u |
50 u |
80% =
80100=
45 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 do not wear glasses
= 12 u + 20 u
= 32 u
Total number of pupils
= 12 u + 3 u + 20 u + 15 u
= 50 u
Percentage of the pupils in the theme park who do not wear glasses
=
3250 x 100%
= 64%
Answer(s): 64%