There are some pupils in the bird park.
310 of them are boys, of whom 20% of them do not wear caps.
47 of the girls do not wear caps. What is the percentage of the pupils in the bird park who wear caps?
Boys |
Girls |
Total |
3x5 = 15 u |
7x5 = 35 u |
10x5 = 50 u |
No caps |
Caps |
No caps |
Caps |
|
1x3 |
4x3 |
4x5 |
3x5 |
|
3 u |
12 u |
20 u |
15 u |
50 u |
20% =
20100=
15 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 caps
= 12 u + 15 u
= 27 u
Total number of pupils
= 3 u + 12 u + 20 u + 15 u
= 50 u
Percentage of the pupils in the bird park who wear caps
=
2750 x 100%
= 54%
Answer(s): 54%