How to use data validation to force percentage in Excel cells?

Supposing there is a table which needed to force users to type data in percentage in a sheet, how can you handle this job in Excel? Here I will talk about how to use the Data Validation function to deal with it.

Force percentage entries with Data Validation

Force unique entries with Prevent Duplicategood idea3

Prevent duplicate values entering in a column in Excel

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Force percentage entries with Data Validation

To force entries in percentage, please do as these steps:

1. Select the cells you want to force entering percentage, click Home tab, then in Number group, to select Percentage from the drop down list.
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2. Then click Data > Data Validation.
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3. In the Data Validation dialog, under Settings tab, select Decimal from the Allow section, between from the Data section, then type 0.01 and 0.99 into Minimum and Maximum textboxes.
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4. Click OK, now, while you type the numbers are bigger than 100, there will be a warning pop out.
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If you are typing numbers smaller than 100 but bigger than 1, the number will be automatically formatted as percentage.
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Tip: Only can type numbers in this scale 1 ≤ number ≥99.

Force unique entries with Prevent Duplicate

If you want to force users to type unique data in a column, which means to prevent duplicate data entry, you can try Kutools for Excel’s Prevent Duplicate utility.

Kutools for Excel, with more than 200 handy functions, makes your jobs easier. 

After installing Kutools for Excel, please do as below:(Free Download Kutools for Excel Now!)

Select the column you want to prevent duplicate entry, click Kutools > Prevent Typing > Prevent Duplicate.
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Then click Yes > OK to close the reminders.

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From now on, it will pop out a warning to stop duplicate entering.
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