Fill in the blanks.
30% of the boys are equal to 40% 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.
30% =
30100 =
31040% =
40100 =
25310 of the boys =
25 of the girls
Make the numerators the same using the LCM of 3 and 2.
LCM of 3 and 2 = 6
3 x 210 x 2 of the boys =
2 x 35 x 3 of the girls
620 of the boys =
615 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