-98.79% is the change from 829 to 10
Calculation steps:
[( 10 - 829 ) ÷ 829] x 100 = -98.79%
Formula
Percentage change = [(10 - 829) / 829] x 100
Subtract the new number by the original number
10 - 829 = -819
-819 ÷ 829 = -0.9879372738238842
-0.9879372738238842 x 100 = -98.79%