-51.17% is the change from 858 to 419
Calculation steps:
[( 419 - 858 ) ÷ 858] x 100 = -51.17%
Formula
Percentage change = [(419 - 858) / 858] x 100
Subtract the new number by the original number
419 - 858 = -439
-439 ÷ 858 = -0.5116550116550117
-0.5116550116550117 x 100 = -51.17%