-58.94% is the change from 621 to 255
Calculation steps:
[( 255 - 621 ) ÷ 621] x 100 = -58.94%
Formula
Percentage change = [(255 - 621) / 621] x 100
Subtract the new number by the original number
255 - 621 = -366
-366 ÷ 621 = -0.5893719806763285
-0.5893719806763285 x 100 = -58.94%