A book shop had 700 comics. There were Chinese, English and Malay comics in the ratio of 1 : 5 : 8. When the book shop assistant brought in another 270 new comics, the number of Chinese comics was increased by 40% and the number of English comics was increased by
35.
- What was the number of Malay comics that the book shop assistant brought in?
- What was the percentage increase in the number of Malay comics?
|
Chinese |
English |
Malay |
Total |
Before |
1 u |
5 u |
8 u |
700 |
Change |
+ 0.4 u |
+ 3 u |
+ ? |
+ 270 |
After |
1.4 u |
8 u |
10 u |
970 |
Increase in the number of Chinese comics
= 40% x 1 u
=
40100 x 1 u
= 0.4 u
Increase in the number of English comics
=
35 x 5 u
= 3 u
Total number of comics at first
= 1 u + 5 u + 8 u
= 14 u
14 u = 700
1 u = 700 ÷ 14 = 50
Increase in the number of Chinese and English comics
= 0.4 u + 3 u
= 3.4 u
= 3.4 x 50
= 170
Number of Malay comics brought in
= 270 - 170
= 100
(b)
Number of Malay comics at first
= 8 u
= 8 x 50
= 400
Percentage increase in Malay comics
=
100400 x 100%
= 25%
Answer(s): (a) 100; (b) 25%