-70.3% is the change from 862 to 256
Calculation steps:
[( 256 - 862 ) ÷ 862] x 100 = -70.3%
Formula
Percentage change = [(256 - 862) / 862] x 100
Subtract the new number by the original number
256 - 862 = -606
-606 ÷ 862 = -0.703016241299304
-0.703016241299304 x 100 = -70.3%