-58.71% is the change from 620 to 256
Calculation steps:
[( 256 - 620 ) ÷ 620] x 100 = -58.71%
Formula
Percentage change = [(256 - 620) / 620] x 100
Subtract the new number by the original number
256 - 620 = -364
-364 ÷ 620 = -0.5870967741935483
-0.5870967741935483 x 100 = -58.71%