-71.09% is the change from 256 to 74
Calculation steps:
[( 74 - 256 ) ÷ 256] x 100 = -71.09%
Formula
Percentage change = [(74 - 256) / 256] x 100
Subtract the new number by the original number
74 - 256 = -182
-182 ÷ 256 = -0.7109375
-0.7109375 x 100 = -71.09%