64.45% is the change from 512 to 842
Calculation steps:
[( 842 - 512 ) ÷ 512] x 100 = 64.45%
Formula
Percentage change = [(842 - 512) / 512] x 100
Subtract the new number by the original number
842 - 512 = 330
330 ÷ 512 = 0.64453125
0.64453125 x 100 = 64.45%