66.2% is the change from 500 to 831
Calculation steps:
[( 831 - 500 ) ÷ 500] x 100 = 66.2%
Formula
Percentage change = [(831 - 500) / 500] x 100
Subtract the new number by the original number
831 - 500 = 331
331 ÷ 500 = 0.662
0.662 x 100 = 66.2%
Example