-51.92% is the change from 834 to 401
Calculation steps:
[( 401 - 834 ) ÷ 834] x 100 = -51.92%
Formula
Percentage change = [(401 - 834) / 834] x 100
Subtract the new number by the original number
401 - 834 = -433
-433 ÷ 834 = -0.5191846522781774
-0.5191846522781774 x 100 = -51.92%