Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 6.
The ratio of girls to boys is 8 : 7.
The number of women to men is 9 : 5.
Let the number of children be 6 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Difference between the number of girls and men = _____ u
Adults |
Children |
7 u |
6 u |
Women |
Men |
Girls |
Boys |
9 |
5 |
8 |
7 |
|
514 x 7 u = 2.5 u |
815 x 6 u = 3.2 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 6 u
Girls : Boys : Children
8 : 7 : 8 + 7
8 : 7 : 15
Fraction of the children that were girls =
815 Number of girls
=
815 x 6 u
= 3.2 u
(c)
Number of adults = 7 u
Fraction of the adults that were men =
514 Number of men
=
514 x 7 u
= 2.5 u
(d)
Difference between the number of girls and men
= 3.2 u - 2.5 u
= 0.7 u
Answer(s): (a) 7; (b) 3.2; (c) 2.5; (d) 0.7