Fill in the blanks.
15% of the boys are equal to 45% 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.
15% =
15100 =
32045% =
45100 =
920320 of the boys =
920 of the girls
Make the numerators the same using the LCM of 3 and 9.
LCM of 3 and 9 = 9
3 x 320 x 3 of the boys =
9 x 120 x 1 of the girls
960 of the boys =
920 of the girls
The totals are shown in the denominators.
Number of boys = 60 u
(b)
Number of girls = 20 u
(c)
Total number of boys and girls
= 60 u + 20 u
= 80 u
(d)
Difference between the number of boys and girls
= 60 u - 20 u
= 40 u
Answer(s): (a) 60; (b) 20; (c) 80; (d) 40