-37.91% is the change from 831 to 516
Calculation steps:
[( 516 - 831 ) ÷ 831] x 100 = -37.91%
Formula
Percentage change = [(516 - 831) / 831] x 100
Subtract the new number by the original number
516 - 831 = -315
-315 ÷ 831 = -0.37906137184115524
-0.37906137184115524 x 100 = -37.91%