-51.56% is the change from 867 to 420
Calculation steps:
[( 420 - 867 ) ÷ 867] x 100 = -51.56%
Formula
Percentage change = [(420 - 867) / 867] x 100
Subtract the new number by the original number
420 - 867 = -447
-447 ÷ 867 = -0.5155709342560554
-0.5155709342560554 x 100 = -51.56%