Rounding down decimal point values instead of up

We are monitoring a service availability using the Prometheus query up{instance="important.node"}. (The query itself being irrelevant to the question)

Let’s say the value is 99.986…
When setting the decimal point in Grafana Singlestat options to 2, it becomes 99.99. Instead of rounding up the value i would like it to round it down or ignore the rest of the decimal places.
basically 99.986 -> 99.98

Right now i’m using a workaround of
floor(QUERY * 100) / 100 as the query