-71.72% is the change from 831 to 235
Calculation steps:
[( 235 - 831 ) ÷ 831] x 100 = -71.72%
Formula
Percentage change = [(235 - 831) / 831] x 100
Subtract the new number by the original number
235 - 831 = -596
-596 ÷ 831 = -0.717208182912154
-0.717208182912154 x 100 = -71.72%