Fill in the blanks.
20% of the girls are equal to 40% 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 =
1540% =
40100 =
2515 of the girls =
25 of the boys
Make the numerators the same using the LCM of 1 and 2.
LCM of 1 and 2 = 2
1 x 25 x 2 of the girls =
2 x 15 x 1 of the boys
210 of the girls =
25 of the boys
The totals are shown in the denominators.
Number of girls = 10 u
(b)
Number of boys = 5 u
(c)
Total number of girls and boys
= 10 u + 5 u
= 15 u
(d)
Difference between the number of girls and boys
= 10 u - 5 u
= 5 u
Answer(s): (a) 10; (b) 5; (c) 15; (d) 5