-51.52% is the change from 656 to 318
Calculation steps:
[( 318 - 656 ) ÷ 656] x 100 = -51.52%
Formula
Percentage change = [(318 - 656) / 656] x 100
Subtract the new number by the original number
318 - 656 = -338
-338 ÷ 656 = -0.5152439024390244
-0.5152439024390244 x 100 = -51.52%