Decimal place in formula

Good afternoon all,

First post. I’m looking for some help. I’m looking to change the decimal placing that is in a Formula that I have. I would like to have it to two decimal places, not the three monday default at. Is there a way I can change this? If I try and add RoundUP it just gives me the red exclamation mark.

For clarity, this is my current formula:

SUM({Column A}/{Column B}*100)

Thanks
Dalton