-48.31% is the change from 828 to 428
Calculation steps:
[( 428 - 828 ) ÷ 828] x 100 = -48.31%
Formula
Percentage change = [(428 - 828) / 828] x 100
Subtract the new number by the original number
428 - 828 = -400
-400 ÷ 828 = -0.4830917874396135
-0.4830917874396135 x 100 = -48.31%