-98.79% is the change from 827 to 10
Calculation steps:
[( 10 - 827 ) ÷ 827] x 100 = -98.79%
Formula
Percentage change = [(10 - 827) / 827] x 100
Subtract the new number by the original number
10 - 827 = -817
-817 ÷ 827 = -0.9879081015719468
-0.9879081015719468 x 100 = -98.79%