There are 300 apples and peaches for sale at a farmer's market. The ratio of the number of apples to the number of peaches is 7 : 8. If 50 apples and 40 peaches are sold, what is the ratio of the remaining apples to peaches?

7:8 ... added = 15

7/15 (300) = 2100/15 = 140 apples

8/15 (300) = 2400/15 = 160 peaches

if 50 apples and 40 peaches are sold ...

apples : 140 - 50 = 90

peaches : 160 - 40 = 120

ratio of remaining is : 90/120 which reduces to 3/4 or 3:4 or 3 to 4 <==