Fill in the blanks.
45% of the girls are equal to 50% of the boys.
- Number of girls = _____ u
- Number of boys = _____ u
- Total number of girls and boys = _____ u
- Difference between the number of girls and boys = _____ u
(a)
Change percentage into units.
45% =
45100 =
92050% =
50100 =
12920 of the girls =
12 of the boys
Make the numerators the same using the LCM of 9 and 1.
LCM of 9 and 1 = 9
9 x 120 x 1 of the girls =
1 x 92 x 9 of the boys
920 of the girls =
918 of the boys
The totals are shown in the denominators.
Number of girls = 20 u
(b)
Number of boys = 18 u
(c)
Total number of girls and boys
= 20 u + 18 u
= 38 u
(d)
Difference between the number of girls and boys
= 20 u - 18 u
= 2 u
Answer(s): (a) 20; (b) 18; (c) 38; (d) 2