Fill in the blanks.
40% of the girls are equal to 45% 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.
40% =
40100 =
2545% =
45100 =
92025 of the girls =
920 of the boys
Make the numerators the same using the LCM of 2 and 9.
LCM of 2 and 9 = 18
2 x 95 x 9 of the girls =
9 x 220 x 2 of the boys
1845 of the girls =
1840 of the boys
The totals are shown in the denominators.
Number of girls = 45 u
(b)
Number of boys = 40 u
(c)
Total number of girls and boys
= 45 u + 40 u
= 85 u
(d)
Difference between the number of girls and boys
= 45 u - 40 u
= 5 u
Answer(s): (a) 45; (b) 40; (c) 85; (d) 5