-84.05% is the change from 815 to 130
Calculation steps:
[( 130 - 815 ) ÷ 815] x 100 = -84.05%
Formula
Percentage change = [(130 - 815) / 815] x 100
Subtract the new number by the original number
130 - 815 = -685
-685 ÷ 815 = -0.8404907975460123
-0.8404907975460123 x 100 = -84.05%