In a school, there is a total of 280 people.
30% are children.
The rest are adults.
The number of women and men is in the ratio of 3 : 4.
- What percentage of the people are women?
- How many men are there?
Children |
Adults |
Total |
3 u |
7 u |
10 u |
|
Women |
Men |
|
3 u |
3 u |
4 u |
10 u |
(a)
30% =
30100 =
310 The number of adults is the combined repeated identity.
Children : Adults
3 : 10 - 3
3 : 7
Percentage of the people that are women
=
310 x 100%
= 30%
(b)
Total number of people = 10 u
10 u = 280
1 u = 280 ÷ 10 = 28
Number of men
= 4 u
= 4 x 28
= 112
Answer(s): (a) 30%; (b) 112