Displaying uptime in Synthetic monitoring with decimals

I have a customer that installed Synthetic monitoring for Elasticsearch. It works fine and displays uptime from few test devices, however it doesn't show decimals, only regular numbers. Is there a way to show 3 decimals in addition to the usual numbers? Customer wants to see if they are within SLA regarding uptime, f.ex. 99,997 or not. Is there an easy way to fix this or maybe developers can update functionality in Sythetic integration in next release?