Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 6.
The ratio of girls to boys is 5 : 7.
The number of men to women is 1 : 4.
Let the number of children be 6 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 |
6 u |
Men |
Women |
Girls |
Boys |
1 |
4 |
5 |
7 |
|
45 x 1 u = 0.8 u |
512 x 6 u = 2.5 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 6 u
Girls : Boys : Children
5 : 7 : 5 + 7
5 : 7 : 12
Fraction of the children that were girls =
512 Number of girls
=
512 x 6 u
= 2.5 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
45 Number of women
=
45 x 1 u
= 0.8 u
(d)
Difference between the number of girls and women
= 2.5 u - 0.8 u
= 1.7 u
Answer(s): (a) 1; (b) 2.5; (c) 0.8; (d) 1.7