Fill in the blanks.
Number of girls at first is 15% of the children.
Number of girls is then increased to 60%.
- Number of girls at first = _____ u
- Number of girls in the end = _____ u
- Increase in the number of girls = _____ u
- Number of children in the end = _____ u
|
Girls |
Boys |
Before |
3 x 2 = 6 u |
17 x 2 = 34 u |
Change |
+ ? |
No change |
After |
3 x 17 = 51 u |
2 x 17 = 34 u |
(a)
Change percentage into units.
15% =
15100 =
320 60% =
60100 =
35 Fraction of the children who are boys at first
= 1 -
320 =
1720 Fraction of the children who are boys in the end
= 1 -
35=
25 Number of boys at first and in the end remains the same.
The number of boys is the unchanged quantity.
LCM of 17 and 2 = 34
Number of girls at first = 6 u
(b)
Number of girls in the end = 51 u
(c)
Increase in the number of girls
= 51 u - 6 u
= 45 u
(d)
Number of children in the end
= 51 u + 34 u
= 85 u
Answer(s): (a) 6; (b) 51; (c) 45; (d) 85