-25.26% is the change from 859 to 642
Calculation steps:
[( 642 - 859 ) ÷ 859] x 100 = -25.26%
Formula
Percentage change = [(642 - 859) / 859] x 100
Subtract the new number by the original number
642 - 859 = -217
-217 ÷ 859 = -0.25261932479627475
-0.25261932479627475 x 100 = -25.26%