38.71% is the change from 155 to 215
Calculation steps:
[( 215 - 155 ) ÷ 155] x 100 = 38.71%
Formula
Percentage change = [(215 - 155) / 155] x 100
Subtract the new number by the original number
215 - 155 = 60
60 ÷ 155 = 0.3870967741935484
0.3870967741935484 x 100 = 38.71%