21.16% is the change from 397 to 481
Calculation steps:
[( 481 - 397 ) ÷ 397] x 100 = 21.16%
Formula
Percentage change = [(481 - 397) / 397] x 100
Subtract the new number by the original number
481 - 397 = 84
84 ÷ 397 = 0.21158690176322417
0.21158690176322417 x 100 = 21.16%