Fill in the blanks.
15% of the girls are equal to 20% 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 =
32020% =
20100 =
15320 of the girls =
15 of the boys
Make the numerators the same using the LCM of 3 and 1.
LCM of 3 and 1 = 3
3 x 120 x 1 of the girls =
1 x 35 x 3 of the boys
320 of the girls =
315 of the boys
The totals are shown in the denominators.
Number of girls = 20 u
(b)
Number of boys = 15 u
(c)
Total number of girls and boys
= 20 u + 15 u
= 35 u
(d)
Difference between the number of girls and boys
= 20 u - 15 u
= 5 u
Answer(s): (a) 20; (b) 15; (c) 35; (d) 5