The ratio of the number of chickens in Farm L to the number of chickens in Farm M was 7 : 10. There were 60 more chickens in Farm M than in Farm L. When 8 chickens escaped from Farm M, the farmer in Farm M bought another 18 chickens. What was the new ratio of the number of chickens in Farm L to the number of chickens in Farm M in the end? Give your answer in the simplest form.

	Farm L	Farm M
Before	7 u	10 u
Change 1		- 8
Change 2		+ 18
After	7 u	10 u + 10

Number of more chickens in Farm M than Farm L
= 10 u - 7 u
= 3 u

3 u = 60

1 u = 60 ÷ 3 = 20

Number of chickens in Farm L
= 7 u
= 20 x 7
= 140

Number of chickens in Farm M
= 10 u
= 20 x 10
= 200

New number of chickens in Farm M
= 10 u + 10
= 200 + 10
= 210

Farm L : Farm M
140 : 210 _{(÷ 70)}
2 : 3

Answer(s): 2 : 3