31.49% is the change from 397 to 522
Calculation steps:
[( 522 - 397 ) ÷ 397] x 100 = 31.49%
Formula
Percentage change = [(522 - 397) / 397] x 100
Subtract the new number by the original number
522 - 397 = 125
125 ÷ 397 = 0.3148614609571788
0.3148614609571788 x 100 = 31.49%