-95.12% is the change from 861 to 42
Calculation steps:
[( 42 - 861 ) ÷ 861] x 100 = -95.12%
Formula
Percentage change = [(42 - 861) / 861] x 100
Subtract the new number by the original number
42 - 861 = -819
-819 ÷ 861 = -0.9512195121951219
-0.9512195121951219 x 100 = -95.12%