-32.85% is the change from 831 to 558
Calculation steps:
[( 558 - 831 ) ÷ 831] x 100 = -32.85%
Formula
Percentage change = [(558 - 831) / 831] x 100
Subtract the new number by the original number
558 - 831 = -273
-273 ÷ 831 = -0.3285198555956679
-0.3285198555956679 x 100 = -32.85%