-87.35% is the change from 830 to 105
Calculation steps:
[( 105 - 830 ) ÷ 830] x 100 = -87.35%
Formula
Percentage change = [(105 - 830) / 830] x 100
Subtract the new number by the original number
105 - 830 = -725
-725 ÷ 830 = -0.8734939759036144
-0.8734939759036144 x 100 = -87.35%