64.23% is the change from 506 to 831
Calculation steps:
[( 831 - 506 ) ÷ 506] x 100 = 64.23%
Formula
Percentage change = [(831 - 506) / 506] x 100
Subtract the new number by the original number
831 - 506 = 325
325 ÷ 506 = 0.642292490118577
0.642292490118577 x 100 = 64.23%