-81.41% is the change from 834 to 155
Calculation steps:
[( 155 - 834 ) ÷ 834] x 100 = -81.41%
Formula
Percentage change = [(155 - 834) / 834] x 100
Subtract the new number by the original number
155 - 834 = -679
-679 ÷ 834 = -0.8141486810551559
-0.8141486810551559 x 100 = -81.41%