-83.86% is the change from 830 to 134
Calculation steps:
[( 134 - 830 ) ÷ 830] x 100 = -83.86%
Formula
Percentage change = [(134 - 830) / 830] x 100
Subtract the new number by the original number
134 - 830 = -696
-696 ÷ 830 = -0.8385542168674699
-0.8385542168674699 x 100 = -83.86%