-56.85% is the change from 591 to 255
Calculation steps:
[( 255 - 591 ) ÷ 591] x 100 = -56.85%
Formula
Percentage change = [(255 - 591) / 591] x 100
Subtract the new number by the original number
255 - 591 = -336
-336 ÷ 591 = -0.5685279187817259
-0.5685279187817259 x 100 = -56.85%