31.99% is the change from 397 to 524
Calculation steps:
[( 524 - 397 ) ÷ 397] x 100 = 31.99%
Formula
Percentage change = [(524 - 397) / 397] x 100
Subtract the new number by the original number
524 - 397 = 127
127 ÷ 397 = 0.3198992443324937
0.3198992443324937 x 100 = 31.99%