Fill in the blanks.
45% of the boys are equal to 55% 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 =
92055% =
55100 =
1120920 of the boys =
1120 of the girls
Make the numerators the same using the LCM of 9 and 11.
LCM of 9 and 11 = 99
9 x 1120 x 11 of the boys =
11 x 920 x 9 of the girls
99220 of the boys =
99180 of the girls
The totals are shown in the denominators.
Number of boys = 220 u
(b)
Number of girls = 180 u
(c)
Total number of boys and girls
= 220 u + 180 u
= 400 u
(d)
Difference between the number of boys and girls
= 220 u - 180 u
= 40 u
Answer(s): (a) 220; (b) 180; (c) 400; (d) 40