Fill in the blanks.
20% of the girls are equal to 90% 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.
20% =
20100 =
1590% =
90100 =
91015 of the girls =
910 of the boys
Make the numerators the same using the LCM of 1 and 9.
LCM of 1 and 9 = 9
1 x 95 x 9 of the girls =
9 x 110 x 1 of the boys
945 of the girls =
910 of the boys
The totals are shown in the denominators.
Number of girls = 45 u
(b)
Number of boys = 10 u
(c)
Total number of girls and boys
= 45 u + 10 u
= 55 u
(d)
Difference between the number of girls and boys
= 45 u - 10 u
= 35 u
Answer(s): (a) 45; (b) 10; (c) 55; (d) 35