-79.93% is the change from 827 to 166
Calculation steps:
[( 166 - 827 ) ÷ 827] x 100 = -79.93%
Formula
Percentage change = [(166 - 827) / 827] x 100
Subtract the new number by the original number
166 - 827 = -661
-661 ÷ 827 = -0.7992744860943168
-0.7992744860943168 x 100 = -79.93%
Example