Question 702241
First, what you need to do on this problem is see how many times 3 goes into 7 1/2 (which if you see that 1 1/2 + 6 is equal to 7 1/2, you can see that 3 goes into 7 1/2 exactly 2 1/2 times).

knowing that 3 inches is 100 miles on the map, we can conclude that they are 250 miles apart (2 1/2 * 100).