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 view a cell comment

Click the edit comment command on the insert menu
Position the mouse pointer over the cell
Click the comment command on the view menu
Click the display comment command on the window menu

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