63.87% is the change from 512 to 839
Calculation steps:
[( 839 - 512 ) ÷ 512] x 100 = 63.87%
Formula
Percentage change = [(839 - 512) / 512] x 100
Subtract the new number by the original number
839 - 512 = 327
327 ÷ 512 = 0.638671875
0.638671875 x 100 = 63.87%