60 (original total) - 10 (sold to first store) =50 (leftover) 50 / 5 (amount of other stores getting birdhouses) = 10 (amount going to each of the last 5 stores)
First, you need to find out how many men there are. 150-80=70 men. The ratio would be 70:80. Then you need to simplify it. the simplified answer is 7:8
