63.91% is the change from 507 to 831
Calculation steps:
[( 831 - 507 ) ÷ 507] x 100 = 63.91%
Formula
Percentage change = [(831 - 507) / 507] x 100
Subtract the new number by the original number
831 - 507 = 324
324 ÷ 507 = 0.6390532544378699
0.6390532544378699 x 100 = 63.91%