-52.04% is the change from 834 to 400
Calculation steps:
[( 400 - 834 ) ÷ 834] x 100 = -52.04%
Formula
Percentage change = [(400 - 834) / 834] x 100
Subtract the new number by the original number
400 - 834 = -434
-434 ÷ 834 = -0.5203836930455635
-0.5203836930455635 x 100 = -52.04%