-57.42% is the change from 256 to 109
Calculation steps:
[( 109 - 256 ) ÷ 256] x 100 = -57.42%
Formula
Percentage change = [(109 - 256) / 256] x 100
Subtract the new number by the original number
109 - 256 = -147
-147 ÷ 256 = -0.57421875
-0.57421875 x 100 = -57.42%