A book store had 765 novels. There were Malay, Chinese and English novels in the ratio of 4 : 8 : 5. When the book store assistant brought in another 468 new novels, the number of Malay novels was increased by 60% and the number of Chinese novels was increased by ³₄.

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

	Malay	Chinese	English	Total
Before	4 u	8 u	5 u	765
Change	+ 2.4 u	+ 6 u	+ ?	+ 468
After	6.4 u	14 u	7 u	1233

Increase in the number of Malay novels
= 60% x 4 u
= ⁶⁰₁₀₀ x 4 u
= 2.4 u

Increase in the number of Chinese novels
= ³₄ x 8 u
= 6 u

Total number of novels at first
= 4 u + 8 u + 5 u
= 17 u

17 u = 765

1 u = 765 ÷ 17 = 45

Increase in the number of Malay and Chinese novels
= 2.4 u + 6 u
= 8.4 u
= 8.4 x 45
= 378

Number of English novels brought in
= 468 - 378
= 90 

(b)
Number of English novels at first
= 5 u
= 5 x 45
= 225

Percentage increase in English novels
= ⁹⁰₂₂₅ x 100%
= 40%

Answer(s): (a) 90; (b) 40%