65.87% is the change from 501 to 831
Calculation steps:
[( 831 - 501 ) ÷ 501] x 100 = 65.87%
Formula
Percentage change = [(831 - 501) / 501] x 100
Subtract the new number by the original number
831 - 501 = 330
330 ÷ 501 = 0.6586826347305389
0.6586826347305389 x 100 = 65.87%