Fill in the blanks.
30% 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.
30% =
30100 =
31045% =
45100 =
920310 of the girls =
920 of the boys
Make the numerators the same using the LCM of 3 and 9.
LCM of 3 and 9 = 9
3 x 310 x 3 of the girls =
9 x 120 x 1 of the boys
930 of the girls =
920 of the boys
The totals are shown in the denominators.
Number of girls = 30 u
(b)
Number of boys = 20 u
(c)
Total number of girls and boys
= 30 u + 20 u
= 50 u
(d)
Difference between the number of girls and boys
= 30 u - 20 u
= 10 u
Answer(s): (a) 30; (b) 20; (c) 50; (d) 10