-80.26% is the change from 831 to 164
Calculation steps:
[( 164 - 831 ) ÷ 831] x 100 = -80.26%
Formula
Percentage change = [(164 - 831) / 831] x 100
Subtract the new number by the original number
164 - 831 = -667
-667 ÷ 831 = -0.802647412755716
-0.802647412755716 x 100 = -80.26%