-51.45% is the change from 828 to 402
Calculation steps:
[( 402 - 828 ) ÷ 828] x 100 = -51.45%
Formula
Percentage change = [(402 - 828) / 828] x 100
Subtract the new number by the original number
402 - 828 = -426
-426 ÷ 828 = -0.5144927536231884
-0.5144927536231884 x 100 = -51.45%