Excel Percentage help pls-Solved

Can someone help why this doesn't work? I want the result to show the percent of change

but it keeps showing the formula in the cell where the percent needs to be. New $175. is in cell E28 and Old $160.00 is in cell e29. The result is formatted to be percentage

$175.00 =((E28-E29)/E29)*100
$160.00

Solution: As Wayne pointed out a possibility to me, I did accidentally have a space before the formula in the result cell