57.1% is the change from 331 to 520
Calculation steps:
[( 520 - 331 ) ÷ 331] x 100 = 57.1%
Formula
Percentage change = [(520 - 331) / 331] x 100
Subtract the new number by the original number
520 - 331 = 189
189 ÷ 331 = 0.5709969788519638
0.5709969788519638 x 100 = 57.1%