-51.52% is the change from 526 to 255
Calculation steps:
[( 255 - 526 ) ÷ 526] x 100 = -51.52%
Formula
Percentage change = [(255 - 526) / 526] x 100
Subtract the new number by the original number
255 - 526 = -271
-271 ÷ 526 = -0.5152091254752852
-0.5152091254752852 x 100 = -51.52%