A store had 980 novels. There were English, Malay and Chinese novels in the ratio of 3 : 6 : 5. When the store assistant brought in another 546 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 store assistant brought in?
2. What was the percentage increase in the number of Chinese novels?

	English	Malay	Chinese	Total
Before	3 u	6 u	5 u	980
Change	+ 1.8 u	+ 4 u	+ ?	+ 546
After	4.8 u	10 u	7 u	1526

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

Increase in the number of Malay novels
= ²₃ x 6 u
= 4 u

Total number of novels at first
= 3 u + 6 u + 5 u
= 14 u

14 u = 980

1 u = 980 ÷ 14 = 70

Increase in the number of English and Malay novels
= 1.8 u + 4 u
= 5.8 u
= 5.8 x 70
= 406

Number of Chinese novels brought in
= 546 - 406
= 140 

(b)
Number of Chinese novels at first
= 5 u
= 5 x 70
= 350

Percentage increase in Chinese novels
= ¹⁴⁰₃₅₀ x 100%
= 40%

Answer(s): (a) 140; (b) 40%