## How to calculate average rate of change in Excel?

If you know the average speed when you ride a bike, you can calculate how much time you will spend approximately from a place to other by bike. For example you have recorded the time and distance during one bicycle travel as following screen shot shown, you can calculate the average bicycle speed (the average rate of change) in Excel easily.

#### Calculate average rate of change in Excel

To calculate the average rate of change (the average bicycle speed) in Excel, you can easily do as follows:

1. Select the blank cell besides the cell with last distance, in our case select Cell C7, enter the formula =(B7-B2)/((A7-A2)*24) into it and then press the Enter key.

2. Right click the cell you entered the formula just now, and select the Format Cells from the right-clicking menu.

3. Now in the Format Cells dialog box, go to the Number tab, and:
(1) Click the Number in the Category box;
(2) In the Decimal places box, enter the number of decimal places you want to format for the average speed.
(3) Click the OK button.

Now you have calculate the average bicycle speed (average rate of change) and format it in Excel.
Note: Apart from the Format Cells command in the right-clicking menu, you can also format the average bicycle speed with selecting it and clicking the Increase Decimal button  or Decrease Decimal button  on the Home tab.

Tip: Save a range as AutoText entry (remaining cell formats and formulas) for reusing in future
It must be very tedious to refer cells and apply formulas for calculating the averages every time. Kutools for Excel provides a cute workaround of AutoText utility to to save the range as an AutoText entry, which can remain the cell formats and formulas in the range. And then you can reuse this range with just one click in any workbook.

#### Copy formulas exactly/ statically without changing cell references in Excel

Kutools for Excel Exact Copy utility can help you easily copy multiple formulas exactly without changing cell references in Excel, preventing relative cell references updating automatically.

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