67.19% is the change from 512 to 856
Calculation steps:
[( 856 - 512 ) ÷ 512] x 100 = 67.19%
Formula
Percentage change = [(856 - 512) / 512] x 100
Subtract the new number by the original number
856 - 512 = 344
344 ÷ 512 = 0.671875
0.671875 x 100 = 67.19%