-61.85% is the change from 831 to 317
Calculation steps:
[( 317 - 831 ) ÷ 831] x 100 = -61.85%
Formula
Percentage change = [(317 - 831) / 831] x 100
Subtract the new number by the original number
317 - 831 = -514
-514 ÷ 831 = -0.618531889290012
-0.618531889290012 x 100 = -61.85%