Fill in the blanks.
Number of men at first is 20% of the adults.
Number of men is then increased to 35%.
- 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 |
1 x 13 =
13 u |
4 x 13 =
52 u |
| Change |
+ ? |
No change |
| After |
7 x 4 =
28 u |
13 x 4 =
52 u |
(a)
Change percentage into units.
20% =
20100 =
15 35% =
35100 =
720 Fraction of the adults who are women at first
= 1 -
15 =
45 Fraction of the adults who are women in the end
= 1 -
720=
1320 Number of women at first and in the end remains the same.
The number of women is the unchanged quantity.
LCM of 4 and 13 = 52
Number of men at first = 13 u
(b)
Number of men in the end = 28 u
(c)
Increase in the number of men
= 28 u - 13 u
= 15 u
(d)
Number of adults in the end
= 28 u + 52 u
= 80 u
Answer(s): (a) 13; (b) 28; (c) 15; (d) 80 
