In a school, there is a total of 300 people.
10% are children.
The rest are adults.
The number of men and women is in the ratio of 2 : 7.
- What percentage of the people are men?
- How many women are there?
Children |
Adults |
Total |
1 u |
9 u |
10 u |
|
Men |
Women |
|
1 u |
2 u |
7 u |
10 u |
(a)
10% =
10100 =
110 The number of adults is the combined repeated identity.
Children : Adults
1 : 10 - 1
1 : 9
Percentage of the people that are men
=
210 x 100%
= 20%
(b)
Total number of people = 10 u
10 u = 300
1 u = 300 ÷ 10 = 30
Number of women
= 7 u
= 7 x 30
= 210
Answer(s): (a) 20%; (b) 210