You run 4 miles each week. On Monday, you run 1/2 mile. On Tuesday, you run 1/3 mile. How much farther do you run on Monday than on Tuesday?
You can ignore the "4 miles" in this problem!
You walk further (1/2 mile) on Monday than on Tuesday (1/3 mile). All you have to do is to subtract 1/3 mile from 1/2 mile. What is the LCD here? 6.
Can you now do the subtraction?