There are some pupils in the bird park.
110 of them are girls, of whom 30% of them do not wear caps.
29 of the boys do not wear caps. What is the percentage of the pupils in the bird park who wear caps?
Girls |
Boys |
Total |
1x10 = 10 u |
9x10 = 90 u |
10x10 = 100 u |
No caps |
Caps |
No caps |
Caps |
|
3x1 |
7x1 |
2x10 |
7x10 |
|
3 u |
7 u |
20 u |
70 u |
100 u |
30% =
30100=
310 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 10 is 10.
Number of pupils who wear caps
= 7 u + 70 u
= 77 u
Total number of pupils
= 3 u + 7 u + 20 u + 70 u
= 100 u
Percentage of the pupils in the bird park who wear caps
=
77100 x 100%
= 77%
Answer(s): 77%