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Jan's Working with Numbers

    Intro: Common Tasks: Format Numbers

Numbers can be written in different ways and still mean the same amount. For example, 1 can also be written as 1.00, 1.000, or 100%, depending on exactly what you are doing and how you want to look at your numbers. 

[For the perfectionists out there: Yes, I know that there are differences in the exact meaning of the numbers above, especially for measurements. For most purposes in spreadsheets we can treat them as the same.]

Ribbon: Home: Numbers (Excel 2010)Excel includes buttons on the ribbon for some of the most common ways to format numbers. Later you will use a dialog that has even more choices.

Button: Currency (Excel 2010)  or Button: Currency - general icon (Excel 2010) Accounting: (previously named Currency)
Formats the number as money, like showing the number 1 as $1.00 when your system is set to use dollars. Excel comes in different languages, and will use the appropriate local currency and decimal symbol based on the location in Windows' Region & Language (on the Control Panel). The button may even change to the general currency symbol! You are not stuck with the default! The Currency button has a drop list of common currencies and a command to open a longer list. 

WarningWarning: If you play around with the Region and Language settings, an open worksheet may remember changes even after you return the settings to the originals!

Button: Percent (Excel 2010) Percent: Formats the number as a percentage, like 100%. Numbers are rounded by default so that 0.256 becomes 26% instead of 25.6%.

Button: Comma (Excel 2010) Comma: Formats the number to show 2 digits to the right of the decimal and separates every 3 digits to the left of the decimal. If the location is United States, a comma is the symbol for the separator and a period is the decimal. Other locations and other languages may reverse these symbols, using a period to separate and a comma as the decimal symbol. (Why doesn't the whole world do things the way I do?!) 

Buttons: Increase/Decrease Decimals (Excel 2010) Increase/Decrease Decimals: Changes the number of digits showing to the right of the decimal. The number is rounded when decreasing decimals. When increasing decimals, the original digits are shown, rounded to the number of decimal places you have chosen. Excel remembers the actual number that was entered, no matter how many digits you tell it to show. 


WarningApparent errors in calculated values:

Calculations use the underlying numbers in the cells, not the numbers that you see. This can make a difference in the results of the calculation.

Example: Adding the values displayed did not equal the calculated sum

Cell B2 = 512.46 and cell C2 = 66.6666. Cell D2 = B2 + C2, which is 579.1266.

Format the cells to show only one decimal point.

The cells B2 & C2 show the rounded values, but in D2, Excel first adds the original values and then rounds the answer. This is not the same as adding the rounded values that would add up to 579.2!

Sum of two numbers entered with 4 decimal places.  Numbers with decreased decimals - rounded values do not add to value shown!

[Note to teachers: You may need to review percentages and rounding procedures with your students to be sure they understand both of these. VERY important when working with spreadsheets.]

Icon Step-by-Step 

Step-by-Step: Number Formats

 Icon Step-by-Step

What you will learn: to change number formats
what each number format button does
to use Format Painter to copy formatting

Start with: Icon: Excel widh budget-2010.xlsx budget-2010-chart-Lastname-Firstname.xlsx from previous lesson

Number Formats: Currency

  1. Icon: Class diskSave As with the name budget-2010-formats-Lastname-Firstname.xlsx.
  2. Cells B7:B13 in Currency format (Excel 2010)If necessary, click the tab for the Budget sheet to make it the active sheet.
  3. Select cells B7:B13.
  4. On the Home tab click Button: Currency the Currency button to apply the currency number format. 
    Now your numbers look like dollars, if that is the default currency on your computer. In another project you will learn how to change the currency being used.

    What changed: 

    • Added $ to the far left edge of the cell
    • Added a decimal at the right of the whole numbers
    • Shows exactly 2 digits to the right of the decimal
      (Since the numbers were whole numbers to start with, this format adds 2 zeros.)
    • Commas divide groups of three digits to the left of the decimal.
    • Column widened automatically to show all the digits and the $.

Number Formats: Percent

  1. Cells B7:B13 in Percentage formatWhile B7:B13 is still selected, click Button: Percent the Percent button. 

    All the numbers are changed to percentages. Since these were large numbers, they look even larger as percentages.

    What changed:

    • Removed $ and commas.
    • Added % at the right.
    • Moved the two digits that were at the right of the decimal to the left. 

Number Formats: Comma

  1. Cells B7:B13 in Comma formatWhile B7:B13 is still selected, click Button: Comma format (Excel 2010) the Comma button. 

    What changed: 

    • Removed %.
    • Added commas to separate groups of 3 digits to the left of decimal.
    • Shows 2 digits to the right of the decimal.

Number Formats: Change Decimals

  1. Cells B7:B13 after Increase DecimalsWhile B7:B13 is still selected, click Button: Increase Decimals (Excel 2010) the Increase Decimals button. 

    What changed:

    • Gained another digit to the right of the decimal. 
    • The column automatically widened to show the new digits.
  2. Cells B7:b13 after Decrease decimalsClick Button: Decrease Decimals (Excel 2010) the Decrease Decimals button twice

    What changed:

    • Only one zero is left to the right of the decimal. 
    • (The column width did not reduce its width.)

Copy Formatting: Format Painter

Excel and other Office programs have a handy tool for copying formatting from place to place, Format Painter.

  1. Budget sheet C7:C13 after Format Painter applies copied formattingWith the previous formatting still selected, on the Home tab, click on the Format Painter button Button: Format Painter (Excel 2010).
    The mouse pointer changes to the Format Painter shape Pointer: Format Painter shape (Excel 2010) and the selected range gets a dashed border than moves like 'chase' lights.
  2. Drag from C7 to C13.
    The same comma formatting with only one decimal place is applied. The pointer returned to the usual shape and the Format Painter button is not colored anymore. But the column did not widen automatically like it did with the number format buttons.
    Your sheet may show more cells with ######## than the illustration.

    Icon: TipWhat does ###### mean? The hash symbols, ########, mean that the column is not wide enough to show the number. We won't worry with that at this point. If you have used Zoom to reduce or enlarge the view, you may see these ##### symbols in more cells. The number may still print fine. It depends!

    Icon: Warning Always check the Print Preview carefully to be sure all of the numbers will print.

  3. Cells after copying formatting with Format PainterWith the C7:C13 still selected, double-click the Format Painter button Button: Format Painter (Excel 2010).
    Now the pointer will stay in Format Painter shape until you press the ESC key or else click the Format Painter button again.
  4. Drag across the ranges D7:D13, F7:F13, and H7:H13.
    All these cells get the copied formatting without having to click on the Format Painter button again.
  5. Press the ESC key.
    The mouse pointer returns to its normal shape and the Format Painter button loses its color.
  6. Icon: Class diskSave.
    [budget-2010-formats-Lastname-Firstname.xlsx]