Fill in the blanks.
20% of the girls are equal to 70% 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.
20% =
20100 =
1570% =
70100 =
71015 of the girls =
710 of the boys
Make the numerators the same using the LCM of 1 and 7.
LCM of 1 and 7 = 7
1 x 75 x 7 of the girls =
7 x 110 x 1 of the boys
735 of the girls =
710 of the boys
The totals are shown in the denominators.
Number of girls = 35 u
(b)
Number of boys = 10 u
(c)
Total number of girls and boys
= 35 u + 10 u
= 45 u
(d)
Difference between the number of girls and boys
= 35 u - 10 u
= 25 u
Answer(s): (a) 35; (b) 10; (c) 45; (d) 25