-50.76% is the change from 851 to 419
Calculation steps:
[( 419 - 851 ) ÷ 851] x 100 = -50.76%
Formula
Percentage change = [(419 - 851) / 851] x 100
Subtract the new number by the original number
419 - 851 = -432
-432 ÷ 851 = -0.5076380728554641
-0.5076380728554641 x 100 = -50.76%