A book shop had 660 novels. There were English, Malay and Chinese novels in the ratio of 1 : 3 : 8. When the book shop assistant brought in another 363 new novels, the number of English novels was increased by 60% and the number of Malay novels was increased by ²₃.

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

	English	Malay	Chinese	Total
Before	1 u	3 u	8 u	660
Change	+ 0.6 u	+ 2 u	+ ?	+ 363
After	1.6 u	5 u	12 u	1023

Increase in the number of English novels
= 60% x 1 u
= ⁶⁰₁₀₀ x 1 u
= 0.6 u

Increase in the number of Malay novels
= ²₃ x 3 u
= 2 u

Total number of novels at first
= 1 u + 3 u + 8 u
= 12 u

12 u = 660

1 u = 660 ÷ 12 = 55

Increase in the number of English and Malay novels
= 0.6 u + 2 u
= 2.6 u
= 2.6 x 55
= 143

Number of Chinese novels brought in
= 363 - 143
= 220 

(b)
Number of Chinese novels at first
= 8 u
= 8 x 55
= 440

Percentage increase in Chinese novels
= ²²⁰₄₄₀ x 100%
= 50%

Answer(s): (a) 220; (b) 50%