Fill in the blanks.
15% of the girls are equal to 30% 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.
15% =
15100 =
32030% =
30100 =
310320 of the girls =
310 of the boys
Make the numerators the same using the LCM of 3 and 3.
LCM of 3 and 3 = 3
3 x 120 x 1 of the girls =
3 x 110 x 1 of the boys
320 of the girls =
310 of the boys
The totals are shown in the denominators.
Number of girls = 20 u
(b)
Number of boys = 10 u
(c)
Total number of girls and boys
= 20 u + 10 u
= 30 u
(d)
Difference between the number of girls and boys
= 20 u - 10 u
= 10 u
Answer(s): (a) 20; (b) 10; (c) 30; (d) 10