Alert Custom Format Value

I'm a bit confused on how to round off the value of the alert created for the exchange

Here's the Ex:

${N=SwisEntity;M=DatabaseCopyAlert.LogUsedTotalPercentage}

I already tried  "Percent Total Log Used" "${SQL: SELECT Round(${N=SwisEntity;M=DatabaseCopyAlert.LogUsedTotalPercentage}, 2) } or ${SQL: SELECT Round(${LogUsedTotalPercentage}, 2)}%" but the result was 39.2500%.