38.66% is the change from 388 to 538
Calculation steps:
[( 538 - 388 ) ÷ 388] x 100 = 38.66%
Formula
Percentage change = [(538 - 388) / 388] x 100
Subtract the new number by the original number
538 - 388 = 150
150 ÷ 388 = 0.3865979381443299
0.3865979381443299 x 100 = 38.66%