MS Excel
When all the numbers between 0 and 100 in a range should be displayed in Red Color, apply

All of above
Select the cells that contain number between 0 and 100 then click Red color on Text Color tool
Use =if() function to format the required numbers red
Apply Conditional Formatting command on Format menu

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MS Excel
To save a workbook, you:

Press Ctrl+ F5
Select Edit > Save
Click Save on the Windows Start button
Click the save button on the standard toolbar from the menu

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MS Excel
If you need to remove only the formatting done in a range (numbers and formula typed there should not be removed), you must

Double click the Format Painter and then press Esc key in keyboard
Click on Remove Formatting tool on Standard Toolbar
From Edit menu choose Clear and then Formats
From Edit menu choose Delete

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