76.37% is the change from 512 to 903
Calculation steps:
[( 903 - 512 ) ÷ 512] x 100 = 76.37%
Formula
Percentage change = [(903 - 512) / 512] x 100
Subtract the new number by the original number
903 - 512 = 391
391 ÷ 512 = 0.763671875
0.763671875 x 100 = 76.37%