-48.59% is the change from 815 to 419
Calculation steps:
[( 419 - 815 ) ÷ 815] x 100 = -48.59%
Formula
Percentage change = [(419 - 815) / 815] x 100
Subtract the new number by the original number
419 - 815 = -396
-396 ÷ 815 = -0.48588957055214727
-0.48588957055214727 x 100 = -48.59%