-69.04% is the change from 827 to 256
Calculation steps:
[( 256 - 827 ) ÷ 827] x 100 = -69.04%
Formula
Percentage change = [(256 - 827) / 827] x 100
Subtract the new number by the original number
256 - 827 = -571
-571 ÷ 827 = -0.6904474002418379
-0.6904474002418379 x 100 = -69.04%