Fill in the blanks.
70% of the boys are equal to 80% of the girls.
- Number of boys = _____ u
- Number of girls = _____ u
- Total number of boys and girls = _____ u
- Difference between the number of boys and girls = _____ u
(a)
Change percentage into units.
70% =
70100 =
71080% =
80100 =
45710 of the boys =
45 of the girls
Make the numerators the same using the LCM of 7 and 4.
LCM of 7 and 4 = 28
7 x 410 x 4 of the boys =
4 x 75 x 7 of the girls
2840 of the boys =
2835 of the girls
The totals are shown in the denominators.
Number of boys = 40 u
(b)
Number of girls = 35 u
(c)
Total number of boys and girls
= 40 u + 35 u
= 75 u
(d)
Difference between the number of boys and girls
= 40 u - 35 u
= 5 u
Answer(s): (a) 40; (b) 35; (c) 75; (d) 5