-70.2% is the change from 859 to 256
Calculation steps:
[( 256 - 859 ) ÷ 859] x 100 = -70.2%
Formula
Percentage change = [(256 - 859) / 859] x 100
Subtract the new number by the original number
256 - 859 = -603
-603 ÷ 859 = -0.7019790454016298
-0.7019790454016298 x 100 = -70.2%