38.79% is the change from 397 to 551
Calculation steps:
[( 551 - 397 ) ÷ 397] x 100 = 38.79%
Formula
Percentage change = [(551 - 397) / 397] x 100
Subtract the new number by the original number
551 - 397 = 154
154 ÷ 397 = 0.3879093198992443
0.3879093198992443 x 100 = 38.79%