-79.66% is the change from 831 to 169
Calculation steps:
[( 169 - 831 ) ÷ 831] x 100 = -79.66%
Formula
Percentage change = [(169 - 831) / 831] x 100
Subtract the new number by the original number
169 - 831 = -662
-662 ÷ 831 = -0.7966305655836342
-0.7966305655836342 x 100 = -79.66%