Label decimal values as percentages using Arcade expression in ArcGIS Online

Summary

In some instances, an attribute value in percentage is written in decimal values when displayed in labels on web maps in ArcGIS Online. In this article, an Arcade expression is used to convert the decimal values to percentages and display the percentages in labels. In this example, the field used to display the percentages as decimal values is 'Ratio’.

The image below displays labels with decimal values in ArcGIS Online.

Procedure

1. Open the web map in ArcGIS Online Map Viewer.
2. On the Settings (light) toolbar, click Labels .

Note:
Ensure labels are enabled, refer to ArcGIS Online: Apply labels for instructions.

3. In the Label features pane, under Label field, click Use expression .
4. In the editor window, type the following expression and replace <field_name> with the name of the field to be displayed as labels. This is a conditional statement that does not label any feature that has a value of 0.00. It labels other features by multiplying the value by 100 and adding a percent sign.

IIf($feature.<field_name> == 0.00, null, ($feature.<field_name> * 100) + "%")

Note:
For multiline labels, specify the expression as follows.

'<field_name>:' + $feature.<field_name> + TextFormatting.NewLine + '<field_name>:' + $feature.<field_name> + TextFormatting.NewLine + '<field_name>:'+ IIf($feature.<field_name> == 0.00, null, ($feature.<field_name> * 100) + "%")

5. Click Done in the bottom right corner of the window.

The image below displays the percentage labels on the web map in ArcGIS Online.