29.95% is the change from 394 to 512
Calculation steps:
[( 512 - 394 ) ÷ 394] x 100 = 29.95%
Formula
Percentage change = [(512 - 394) / 394] x 100
Subtract the new number by the original number
512 - 394 = 118
118 ÷ 394 = 0.29949238578680204
0.29949238578680204 x 100 = 29.95%