61.36% is the change from 515 to 831
Calculation steps:
[( 831 - 515 ) ÷ 515] x 100 = 61.36%
Formula
Percentage change = [(831 - 515) / 515] x 100
Subtract the new number by the original number
831 - 515 = 316
316 ÷ 515 = 0.6135922330097088
0.6135922330097088 x 100 = 61.36%