29.7% is the change from 394 to 511
Calculation steps:
[( 511 - 394 ) ÷ 394] x 100 = 29.7%
Formula
Percentage change = [(511 - 394) / 394] x 100
Subtract the new number by the original number
511 - 394 = 117
117 ÷ 394 = 0.2969543147208122
0.2969543147208122 x 100 = 29.7%