-50.24% is the change from 842 to 419
Calculation steps:
[( 419 - 842 ) ÷ 842] x 100 = -50.24%
Formula
Percentage change = [(419 - 842) / 842] x 100
Subtract the new number by the original number
419 - 842 = -423
-423 ÷ 842 = -0.502375296912114
-0.502375296912114 x 100 = -50.24%