-49.4% is the change from 828 to 419
Calculation steps:
[( 419 - 828 ) ÷ 828] x 100 = -49.4%
Formula
Percentage change = [(419 - 828) / 828] x 100
Subtract the new number by the original number
419 - 828 = -409
-409 ÷ 828 = -0.4939613526570048
-0.4939613526570048 x 100 = -49.4%