-40.07% is the change from 831 to 498
Calculation steps:
[( 498 - 831 ) ÷ 831] x 100 = -40.07%
Formula
Percentage change = [(498 - 831) / 831] x 100
Subtract the new number by the original number
498 - 831 = -333
-333 ÷ 831 = -0.4007220216606498
-0.4007220216606498 x 100 = -40.07%