Fill in the blanks.
40% of the boys are equal to 70% 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.
40% =
40100 =
2570% =
70100 =
71025 of the boys =
710 of the girls
Make the numerators the same using the LCM of 2 and 7.
LCM of 2 and 7 = 14
2 x 75 x 7 of the boys =
7 x 210 x 2 of the girls
1435 of the boys =
1420 of the girls
The totals are shown in the denominators.
Number of boys = 35 u
(b)
Number of girls = 20 u
(c)
Total number of boys and girls
= 35 u + 20 u
= 55 u
(d)
Difference between the number of boys and girls
= 35 u - 20 u
= 15 u
Answer(s): (a) 35; (b) 20; (c) 55; (d) 15