38.5% is the change from 600 to 831
Calculation steps:
[( 831 - 600 ) ÷ 600] x 100 = 38.5%
Formula
Percentage change = [(831 - 600) / 600] x 100
Subtract the new number by the original number
831 - 600 = 231
231 ÷ 600 = 0.385
0.385 x 100 = 38.5%
Example