The ratio of the number of chickens in Farm J to the number of chickens in Farm K was 4 : 7. There were 66 more chickens in Farm K than in Farm J. When 12 chickens escaped from Farm K, the farmer in Farm K bought another 16 chickens. What was the new ratio of the number of chickens in Farm J to the number of chickens in Farm K in the end? Give your answer in the simplest form.

	Farm J	Farm K
Before	4 u	7 u
Change 1		- 12
Change 2		+ 16
After	4 u	7 u + 4

Number of more chickens in Farm K than Farm J
= 7 u - 4 u
= 3 u

3 u = 66

1 u = 66 ÷ 3 = 22

Number of chickens in Farm J
= 4 u
= 22 x 4
= 88

Number of chickens in Farm K
= 7 u
= 22 x 7
= 154

New number of chickens in Farm K
= 7 u + 4
= 154 + 4
= 158

Farm J : Farm K
88 : 158 _{(÷ 2)}
44 : 79

Answer(s): 44 : 79