A store had 980 fiction books. There were Malay, Chinese and English fiction books in the ratio of 3 : 6 : 5. When the store assistant brought in another 434 new fiction books, the number of Malay fiction books was increased by 40% and the number of Chinese fiction books was increased by ¹₃.

1. What was the number of English fiction books that the store assistant brought in?
2. What was the percentage increase in the number of English fiction books?

	Malay	Chinese	English	Total
Before	3 u	6 u	5 u	980
Change	+ 1.2 u	+ 2 u	+ ?	+ 434
After	4.2 u	8 u	8 u	1414

Increase in the number of Malay fiction books
= 40% x 3 u
= ⁴⁰₁₀₀ x 3 u
= 1.2 u

Increase in the number of Chinese fiction books
= ¹₃ x 6 u
= 2 u

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

14 u = 980

1 u = 980 ÷ 14 = 70

Increase in the number of Malay and Chinese fiction books
= 1.2 u + 2 u
= 3.2 u
= 3.2 x 70
= 224

Number of English fiction books brought in
= 434 - 224
= 210 

(b)
Number of English fiction books at first
= 5 u
= 5 x 70
= 350

Percentage increase in English fiction books
= ²¹⁰₃₅₀ x 100%
= 60%

Answer(s): (a) 210; (b) 60%