A book store had 110 comics. There were English, Malay and Chinese comics in the ratio of 3 : 6 : 2. When the book store assistant brought in another 38 new comics, the number of English comics was increased by 60% and the number of Malay comics was increased by ¹₆.

1. What was the number of Chinese comics that the book store assistant brought in?
2. What was the percentage increase in the number of Chinese comics?

	English	Malay	Chinese	Total
Before	3 u	6 u	2 u	110
Change	+ 1.8 u	+ 1 u	+ ?	+ 38
After	4.8 u	7 u	3 u	148

Increase in the number of English comics
= 60% x 3 u
= ⁶⁰₁₀₀ x 3 u
= 1.8 u

Increase in the number of Malay comics
= ¹₆ x 6 u
= 1 u

Total number of comics at first
= 3 u + 6 u + 2 u
= 11 u

11 u = 110

1 u = 110 ÷ 11 = 10

Increase in the number of English and Malay comics
= 1.8 u + 1 u
= 2.8 u
= 2.8 x 10
= 28

Number of Chinese comics brought in
= 38 - 28
= 10 

(b)
Number of Chinese comics at first
= 2 u
= 2 x 10
= 20

Percentage increase in Chinese comics
= ¹⁰₂₀ x 100%
= 50%

Answer(s): (a) 10; (b) 50%