Fill in the blanks.
Number of men at first is 30% of the adults.
Number of men is then increased to 70%.
- Number of men at first = _____ u
- Number of men in the end = _____ u
- Increase in the number of men = _____ u
- Number of adults in the end = _____ u
|
Men |
Women |
Before |
3 x 3 = 9 u |
7 x 3 = 21 u |
Change |
+ ? |
No change |
After |
7 x 7 = 49 u |
3 x 7 = 21 u |
(a)
Change percentage into units.
30% =
30100 =
310 70% =
70100 =
710 Fraction of the adults who are women at first
= 1 -
310 =
710 Fraction of the adults who are women in the end
= 1 -
710=
310 Number of women at first and in the end remains the same.
The number of women is the unchanged quantity.
LCM of 7 and 3 = 21
Number of men at first = 9 u
(b)
Number of men in the end = 49 u
(c)
Increase in the number of men
= 49 u - 9 u
= 40 u
(d)
Number of adults in the end
= 49 u + 21 u
= 70 u
Answer(s): (a) 9; (b) 49; (c) 40; (d) 70