Fill in the blanks.
60% 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.
60% =
60100 =
3580% =
80100 =
4535 of the boys =
45 of the girls
Make the numerators the same using the LCM of 3 and 4.
LCM of 3 and 4 = 12
3 x 45 x 4 of the boys =
4 x 35 x 3 of the girls
1220 of the boys =
1215 of the girls
The totals are shown in the denominators.
Number of boys = 20 u
(b)
Number of girls = 15 u
(c)
Total number of boys and girls
= 20 u + 15 u
= 35 u
(d)
Difference between the number of boys and girls
= 20 u - 15 u
= 5 u
Answer(s): (a) 20; (b) 15; (c) 35; (d) 5