Fill in the blanks.
55% of the boys are equal to 90% 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.
55% =
55100 =
112090% =
90100 =
9101120 of the boys =
910 of the girls
Make the numerators the same using the LCM of 11 and 9.
LCM of 11 and 9 = 99
11 x 920 x 9 of the boys =
9 x 1110 x 11 of the girls
99180 of the boys =
99110 of the girls
The totals are shown in the denominators.
Number of boys = 180 u
(b)
Number of girls = 110 u
(c)
Total number of boys and girls
= 180 u + 110 u
= 290 u
(d)
Difference between the number of boys and girls
= 180 u - 110 u
= 70 u
Answer(s): (a) 180; (b) 110; (c) 290; (d) 70