In a school, there is a total of 370 people.
40% are adults.
The rest are children.
The number of girls and boys is in the ratio of 2 : 1.
- What percentage of the people are girls?
- How many boys are there?
Adults |
Children |
Total |
2 u |
3 u |
5 u |
|
Girls |
Boys |
|
2 u |
2 u |
1 u |
5 u |
(a)
40% =
40100 =
25 The number of children is the combined repeated identity.
Adults : Children
2 : 5 - 2
2 : 3
Percentage of the people that are girls
=
25 x 100%
= 40%
(b)
Total number of people = 5 u
5 u = 370
1 u = 370 ÷ 5 = 74
Number of boys
= 1 u
= 1 x 74
= 74
Answer(s): (a) 40%; (b) 74