A produce store offers red and green apples. In one morning they sold 39 apples total, if 9 of the apples they sold were red, what is the ratio of green sold to red sold?

Red apples + green apples = 39 apples

9 red apples + green apples = 39 apples

OR

Red apples = X

Green apples = Y

X + Y = 39

9+Y = 39

Y = 30 (Subtract 9 from both sides)

ratio = 9/30 or 3/10 (reduce the fraction by dividing by 3)