-93.75% is the change from 256 to 16
Calculation steps:
[( 16 - 256 ) ÷ 256] x 100 = -93.75%
Formula
Percentage change = [(16 - 256) / 256] x 100
Subtract the new number by the original number
16 - 256 = -240
-240 ÷ 256 = -0.9375
-0.9375 x 100 = -93.75%