I found the solution under Project Preferences > Working Units > Decimals (set it to 2) and this worked!

Hi Gerry, thanks for your reply and explanation. I'm still trying to get my head around the options and what's going to work best. This is not a "one off" and is something I hope to figure out and have in our Archicad template to use in all future pr...

Thanks for the help Barry. I've checked the Calculation Units in Project Preferences and they are set to 2. And I've removed the rounding and 2 from the equation but I'm still seeing 3 decimal places.... very strange!

I'm trying to create 1 schedule to incorporate a number of factors but am really struggling to do this easily within Archicad. I have 70 individual lots, for each lot I want a total site area, and then also want separate figures to show the building ...

Thanks Barry, I have managed to enter ROUND to 2 but in my schedule it still have 4 decimal places?  Is there also any way to add a % inside the cell next to number? ie 10.00% Thanks