25.78% is the change from 512 to 644
Calculation steps:
[( 644 - 512 ) ÷ 512] x 100 = 25.78%
Formula
Percentage change = [(644 - 512) / 512] x 100
Subtract the new number by the original number
644 - 512 = 132
132 ÷ 512 = 0.2578125
0.2578125 x 100 = 25.78%