Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 7.
The ratio of girls to boys is 1 : 9.
The number of men to women is 3 : 2.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
1 u |
7 u |
Men |
Women |
Girls |
Boys |
3 |
2 |
1 |
9 |
|
25 x 1 u = 0.4 u |
110 x 7 u = 0.7 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 7 u
Girls : Boys : Children
1 : 9 : 1 + 9
1 : 9 : 10
Fraction of the children that were girls =
110 Number of girls
=
110 x 7 u
= 0.7 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
25 Number of women
=
25 x 1 u
= 0.4 u
(d)
Difference between the number of girls and women
= 0.7 u - 0.4 u
= 0.3 u
Answer(s): (a) 1; (b) 0.7; (c) 0.4; (d) 0.3