-50.87% is the change from 861 to 423
Calculation steps:
[( 423 - 861 ) ÷ 861] x 100 = -50.87%
Formula
Percentage change = [(423 - 861) / 861] x 100
Subtract the new number by the original number
423 - 861 = -438
-438 ÷ 861 = -0.5087108013937283
-0.5087108013937283 x 100 = -50.87%