-50.98% is the change from 818 to 401
Calculation steps:
[( 401 - 818 ) ÷ 818] x 100 = -50.98%
Formula
Percentage change = [(401 - 818) / 818] x 100
Subtract the new number by the original number
401 - 818 = -417
-417 ÷ 818 = -0.5097799511002445
-0.5097799511002445 x 100 = -50.98%