-51.22% is the change from 861 to 420
Calculation steps:
[( 420 - 861 ) ÷ 861] x 100 = -51.22%
Formula
Percentage change = [(420 - 861) / 861] x 100
Subtract the new number by the original number
420 - 861 = -441
-441 ÷ 861 = -0.5121951219512195
-0.5121951219512195 x 100 = -51.22%