-99.16% is the change from 829 to 7
Calculation steps:
[( 7 - 829 ) ÷ 829] x 100 = -99.16%
Formula
Percentage change = [(7 - 829) / 829] x 100
Subtract the new number by the original number
7 - 829 = -822
-822 ÷ 829 = -0.991556091676719
-0.991556091676719 x 100 = -99.16%