57.88% is the change from 330 to 521
Calculation steps:
[( 521 - 330 ) ÷ 330] x 100 = 57.88%
Formula
Percentage change = [(521 - 330) / 330] x 100
Subtract the new number by the original number
521 - 330 = 191
191 ÷ 330 = 0.5787878787878787
0.5787878787878787 x 100 = 57.88%