-58.2% is the change from 610 to 255
Calculation steps:
[( 255 - 610 ) ÷ 610] x 100 = -58.2%
Formula
Percentage change = [(255 - 610) / 610] x 100
Subtract the new number by the original number
255 - 610 = -355
-355 ÷ 610 = -0.5819672131147541
-0.5819672131147541 x 100 = -58.2%