Comparative Income Statement showing huge percentage variance because prior period amount is negative .06. shouldn't that round to zero before making calculations?

the current amount is 1,470.87 the prior period amount is -.06 so my percentage variance is showing as 2,411,550 which is crazy. it should just be zero because the prior period amount column is showing a zero.

Not sure how to fix this? I'm way too new to Sage and have been digging for answeres because the Financial Statements have to be turned in today...