-99.28% is the change from 830 to 6
Calculation steps:
[( 6 - 830 ) ÷ 830] x 100 = -99.28%
Formula
Percentage change = [(6 - 830) / 830] x 100
Subtract the new number by the original number
6 - 830 = -824
-824 ÷ 830 = -0.9927710843373494
-0.9927710843373494 x 100 = -99.28%