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Stop writing percentage formulas in Excel—use this instead

Excel PivotTables replace manual percentage formulas with built-in tools for totals, trends, and nested analysis.
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Formatting Numbers as Percentages in Excel Is Frustrating—But Here's an Easy Fix

When you apply Microsoft Excel's percentage number format to a cell already containing a number, it multiplies the value by 100. This can be frustrating, as there's apparently no easy way to stop this ...