Percentage Formatting

Not really sure where this belongs to be honest. I am ingesting a field that has a numeric value that represents a percentage. So 5 is 5%, 50 is 50%, 100 is 100%. Unfortunately, I can't figure out the Kibana formatting to not add additional zeros onto the existing value (currently, it sees 100 as 10,000%) and I can't find an elasticsearch data type to identify it as a percentage. Is there a way in Logstash I can run math on the number to convert it to a decimal expression?

Use a ruby filter with the following code:

event.set('fieldname', event.get('fieldname') / 100)

But I'd be surprised if Kibana's field formatter wasn't capable of formatting this properly.