Fill in the blanks.
45% 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.
45% =
45100 =
92070% =
70100 =
710920 of the boys =
710 of the girls
Make the numerators the same using the LCM of 9 and 7.
LCM of 9 and 7 = 63
9 x 720 x 7 of the boys =
7 x 910 x 9 of the girls
63140 of the boys =
6390 of the girls
The totals are shown in the denominators.
Number of boys = 140 u
(b)
Number of girls = 90 u
(c)
Total number of boys and girls
= 140 u + 90 u
= 230 u
(d)
Difference between the number of boys and girls
= 140 u - 90 u
= 50 u
Answer(s): (a) 140; (b) 90; (c) 230; (d) 50