31.03% is the change from 522 to 684
Calculation steps:
[( 684 - 522 ) ÷ 522] x 100 = 31.03%
Formula
Percentage change = [(684 - 522) / 522] x 100
Subtract the new number by the original number
684 - 522 = 162
162 ÷ 522 = 0.3103448275862069
0.3103448275862069 x 100 = 31.03%