-50.76% is the change from 656 to 323
Calculation steps:
[( 323 - 656 ) ÷ 656] x 100 = -50.76%
Formula
Percentage change = [(323 - 656) / 656] x 100
Subtract the new number by the original number
323 - 656 = -333
-333 ÷ 656 = -0.5076219512195121
-0.5076219512195121 x 100 = -50.76%