-84.53% is the change from 834 to 129
Calculation steps:
[( 129 - 834 ) ÷ 834] x 100 = -84.53%
Formula
Percentage change = [(129 - 834) / 834] x 100
Subtract the new number by the original number
129 - 834 = -705
-705 ÷ 834 = -0.8453237410071942
-0.8453237410071942 x 100 = -84.53%