Fill in the blanks.
20% of the boys are equal to 80% of the girls.
- Number of boys = _____ u
- Number of girls = _____ u
- Total number of boys and girls = _____ u
- Difference between the number of boys and girls = _____ u
(a)
Change percentage into units.
20% =
20100 =
1580% =
80100 =
4515 of the boys =
45 of the girls
Make the numerators the same using the LCM of 1 and 4.
LCM of 1 and 4 = 4
1 x 45 x 4 of the boys =
4 x 15 x 1 of the girls
420 of the boys =
45 of the girls
The totals are shown in the denominators.
Number of boys = 20 u
(b)
Number of girls = 5 u
(c)
Total number of boys and girls
= 20 u + 5 u
= 25 u
(d)
Difference between the number of boys and girls
= 20 u - 5 u
= 15 u
Answer(s): (a) 20; (b) 5; (c) 25; (d) 15