A shop had 630 magazines. There were English, Malay and Chinese magazines in the ratio of 7 : 6 : 8. When the shop assistant brought in another 306 new magazines, the number of English magazines was increased by 60% and the number of Malay magazines was increased by ²₃.

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

	English	Malay	Chinese	Total
Before	7 u	6 u	8 u	630
Change	+ 4.2 u	+ 4 u	+ ?	+ 306
After	11.2 u	10 u	10 u	936

Increase in the number of English magazines
= 60% x 7 u
= ⁶⁰₁₀₀ x 7 u
= 4.2 u

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

Total number of magazines at first
= 7 u + 6 u + 8 u
= 21 u

21 u = 630

1 u = 630 ÷ 21 = 30

Increase in the number of English and Malay magazines
= 4.2 u + 4 u
= 8.2 u
= 8.2 x 30
= 246

Number of Chinese magazines brought in
= 306 - 246
= 60 

(b)
Number of Chinese magazines at first
= 8 u
= 8 x 30
= 240

Percentage increase in Chinese magazines
= ⁶⁰₂₄₀ x 100%
= 25%

Answer(s): (a) 60; (b) 25%