19.65% is the change from 397 to 475
Calculation steps:
[( 475 - 397 ) ÷ 397] x 100 = 19.65%
Formula
Percentage change = [(475 - 397) / 397] x 100
Subtract the new number by the original number
475 - 397 = 78
78 ÷ 397 = 0.1964735516372796
0.1964735516372796 x 100 = 19.65%