Fill in the blanks.
15% 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.
15% =
15100 =
32090% =
90100 =
910320 of the girls =
910 of the boys
Make the numerators the same using the LCM of 3 and 9.
LCM of 3 and 9 = 9
3 x 320 x 3 of the girls =
9 x 110 x 1 of the boys
960 of the girls =
910 of the boys
The totals are shown in the denominators.
Number of girls = 60 u
(b)
Number of boys = 10 u
(c)
Total number of girls and boys
= 60 u + 10 u
= 70 u
(d)
Difference between the number of girls and boys
= 60 u - 10 u
= 50 u
Answer(s): (a) 60; (b) 10; (c) 70; (d) 50