-51.11% is the change from 857 to 419
Calculation steps:
[( 419 - 857 ) ÷ 857] x 100 = -51.11%
Formula
Percentage change = [(419 - 857) / 857] x 100
Subtract the new number by the original number
419 - 857 = -438
-438 ÷ 857 = -0.5110851808634772
-0.5110851808634772 x 100 = -51.11%