Fill in the blanks.
Number of girls at first is 35% of the children.
Number of girls is then increased to 75%.
- 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 |
7 x 1 = 7 u |
13 x 1 = 13 u |
Change |
+ ? |
No change |
After |
3 x 13 = 39 u |
1 x 13 = 13 u |
(a)
Change percentage into units.
35% =
35100 =
720 75% =
75100 =
34 Fraction of the children who are boys at first
= 1 -
720 =
1320 Fraction of the children who are boys in the end
= 1 -
34=
14 Number of boys at first and in the end remains the same.
The number of boys is the unchanged quantity.
LCM of 13 and 1 = 13
Number of girls at first = 7 u
(b)
Number of girls in the end = 39 u
(c)
Increase in the number of girls
= 39 u - 7 u
= 32 u
(d)
Number of children in the end
= 39 u + 13 u
= 52 u
Answer(s): (a) 7; (b) 39; (c) 32; (d) 52