-87.77% is the change from 834 to 102
Calculation steps:
[( 102 - 834 ) ÷ 834] x 100 = -87.77%
Formula
Percentage change = [(102 - 834) / 834] x 100
Subtract the new number by the original number
102 - 834 = -732
-732 ÷ 834 = -0.8776978417266187
-0.8776978417266187 x 100 = -87.77%