-85.49% is the change from 834 to 121
Calculation steps:
[( 121 - 834 ) ÷ 834] x 100 = -85.49%
Formula
Percentage change = [(121 - 834) / 834] x 100
Subtract the new number by the original number
121 - 834 = -713
-713 ÷ 834 = -0.854916067146283
-0.854916067146283 x 100 = -85.49%