-95.83% is the change from 815 to 34
Calculation steps:
[( 34 - 815 ) ÷ 815] x 100 = -95.83%
Formula
Percentage change = [(34 - 815) / 815] x 100
Subtract the new number by the original number
34 - 815 = -781
-781 ÷ 815 = -0.9582822085889571
-0.9582822085889571 x 100 = -95.83%