A store had 975 fiction books. There were Chinese, English and Malay fiction books in the ratio of 4 : 6 : 5. When the store assistant brought in another 377 new fiction books, the number of Chinese fiction books was increased by 20% and the number of English fiction books was increased by
13.
- What was the number of Malay fiction books that the store assistant brought in?
- What was the percentage increase in the number of Malay fiction books?
|
Chinese |
English |
Malay |
Total |
Before |
4 u |
6 u |
5 u |
975 |
Change |
+ 0.8 u |
+ 2 u |
+ ? |
+ 377 |
After |
4.8 u |
8 u |
8 u |
1352 |
Increase in the number of Chinese fiction books
= 20% x 4 u
=
20100 x 4 u
= 0.8 u
Increase in the number of English fiction books
=
13 x 6 u
= 2 u
Total number of fiction books at first
= 4 u + 6 u + 5 u
= 15 u
15 u = 975
1 u = 975 ÷ 15 = 65
Increase in the number of Chinese and English fiction books
= 0.8 u + 2 u
= 2.8 u
= 2.8 x 65
= 182
Number of Malay fiction books brought in
= 377 - 182
= 195
(b)
Number of Malay fiction books at first
= 5 u
= 5 x 65
= 325
Percentage increase in Malay fiction books
=
195325 x 100%
= 60%
Answer(s): (a) 195; (b) 60%