-91.41% is the change from 256 to 22
Calculation steps:
[( 22 - 256 ) ÷ 256] x 100 = -91.41%
Formula
Percentage change = [(22 - 256) / 256] x 100
Subtract the new number by the original number
22 - 256 = -234
-234 ÷ 256 = -0.9140625
-0.9140625 x 100 = -91.41%