Fill in the blanks.
70% of the girls are equal to 85% 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.
70% =
70100 =
71085% =
85100 =
1720710 of the girls =
1720 of the boys
Make the numerators the same using the LCM of 7 and 17.
LCM of 7 and 17 = 119
7 x 1710 x 17 of the girls =
17 x 720 x 7 of the boys
119170 of the girls =
119140 of the boys
The totals are shown in the denominators.
Number of girls = 170 u
(b)
Number of boys = 140 u
(c)
Total number of girls and boys
= 170 u + 140 u
= 310 u
(d)
Difference between the number of girls and boys
= 170 u - 140 u
= 30 u
Answer(s): (a) 170; (b) 140; (c) 310; (d) 30