51.82% is the change from 330 to 501
Calculation steps:
[( 501 - 330 ) ÷ 330] x 100 = 51.82%
Formula
Percentage change = [(501 - 330) / 330] x 100
Subtract the new number by the original number
501 - 330 = 171
171 ÷ 330 = 0.5181818181818182
0.5181818181818182 x 100 = 51.82%