-85.25% is the change from 834 to 123
Calculation steps:
[( 123 - 834 ) ÷ 834] x 100 = -85.25%
Formula
Percentage change = [(123 - 834) / 834] x 100
Subtract the new number by the original number
123 - 834 = -711
-711 ÷ 834 = -0.8525179856115108
-0.8525179856115108 x 100 = -85.25%