62.62% is the change from 511 to 831
Calculation steps:
[( 831 - 511 ) ÷ 511] x 100 = 62.62%
Formula
Percentage change = [(831 - 511) / 511] x 100
Subtract the new number by the original number
831 - 511 = 320
320 ÷ 511 = 0.6262230919765166
0.6262230919765166 x 100 = 62.62%