The ratio of the number of chickens in Farm B to the number of chickens in Farm C was 7 : 9. There were 48 more chickens in Farm C than in Farm B. When 6 chickens escaped from Farm C, the farmer in Farm C bought another 20 chickens. What was the new ratio of the number of chickens in Farm B to the number of chickens in Farm C in the end? Give your answer in the simplest form.

	Farm B	Farm C
Before	7 u	9 u
Change 1		- 6
Change 2		+ 20
After	7 u	9 u + 14

Number of more chickens in Farm C than Farm B
= 9 u - 7 u
= 2 u

2 u = 48

1 u = 48 ÷ 2 = 24

Number of chickens in Farm B
= 7 u
= 24 x 7
= 168

Number of chickens in Farm C
= 9 u
= 24 x 9
= 216

New number of chickens in Farm C
= 9 u + 14
= 216 + 14
= 230

Farm B : Farm C
168 : 230 _{(÷ 2)}
84 : 115

Answer(s): 84 : 115