-53.21% is the change from 545 to 255
Calculation steps:
[( 255 - 545 ) ÷ 545] x 100 = -53.21%
Formula
Percentage change = [(255 - 545) / 545] x 100
Subtract the new number by the original number
255 - 545 = -290
-290 ÷ 545 = -0.5321100917431193
-0.5321100917431193 x 100 = -53.21%