-51.1% is the change from 865 to 423
Calculation steps:
[( 423 - 865 ) ÷ 865] x 100 = -51.1%
Formula
Percentage change = [(423 - 865) / 865] x 100
Subtract the new number by the original number
423 - 865 = -442
-442 ÷ 865 = -0.5109826589595375
-0.5109826589595375 x 100 = -51.1%