Excel is a powerful tool, but sometimes you need a guide to navigate its possibilities. This clip shows the difference between absolute and relative cell references so that any given formula, when copied, gives the results you want. Sometimes you will want to refer to the same cell, even when you are copying a formula to a different place on the worksheet. Other times, you will want the items in the formula to change as you copy them across the columns. You will see how such actions work through simple examples. Once you have mastered the process, there will be no more unexpected answers in your results.