-51.84% is the change from 870 to 419
Calculation steps:
[( 419 - 870 ) ÷ 870] x 100 = -51.84%
Formula
Percentage change = [(419 - 870) / 870] x 100
Subtract the new number by the original number
419 - 870 = -451
-451 ÷ 870 = -0.5183908045977011
-0.5183908045977011 x 100 = -51.84%