21.29% is the change from 155 to 188
Calculation steps:
[( 188 - 155 ) ÷ 155] x 100 = 21.29%
Formula
Percentage change = [(188 - 155) / 155] x 100
Subtract the new number by the original number
188 - 155 = 33
33 ÷ 155 = 0.2129032258064516
0.2129032258064516 x 100 = 21.29%