In a school, there is a total of 560 people.
25% are children.
The rest are adults.
The number of men and women is in the ratio of 1 : 4.
- What percentage of the people are men?
- How many women are there?
Children |
Adults |
Total |
1x5 |
3x5 |
4x5 |
|
Men |
Women |
|
|
1x3 |
4x3 |
|
5 u |
3 u |
12 u |
20 u |
(a)
25% =
25100 =
14 Children : Adults
1 : 4 - 1
1 : 3
Men : Women : Adults
1 : 4 : 5
The number of adults is the combined repeated identity.
Make the number of adults the same using the LCM of 3 and 5.
LCM of 3 and 5 = 15
Percentage of the people that are men
=
320 x 100%
= 15%
(b)
Total number of people = 20 u
20 u = 560
1 u = 560 ÷ 20 = 28
Number of women
= 12 u
= 12 x 28
= 336
Answer(s): (a) 15%; (b) 336