69.53% is the change from 512 to 868
Calculation steps:
[( 868 - 512 ) ÷ 512] x 100 = 69.53%
Formula
Percentage change = [(868 - 512) / 512] x 100
Subtract the new number by the original number
868 - 512 = 356
356 ÷ 512 = 0.6953125
0.6953125 x 100 = 69.53%