-88.13% is the change from 834 to 99
Calculation steps:
[( 99 - 834 ) ÷ 834] x 100 = -88.13%
Formula
Percentage change = [(99 - 834) / 834] x 100
Subtract the new number by the original number
99 - 834 = -735
-735 ÷ 834 = -0.8812949640287769
-0.8812949640287769 x 100 = -88.13%