I am trying to round a number but I keep getting an Infinity number. How do I round this.

4000 / 7135 * 100

Here's the code I've tried.
Code:
Round(readVals(0) / Scaling1 * 100 + ActualValueLow1, 2)

FormatNumber(readVals(0) / Scaling1 * 100 + ActualValueLow1, 2)