31.61% is the change from 155 to 204
Calculation steps:
[( 204 - 155 ) ÷ 155] x 100 = 31.61%
Formula
Percentage change = [(204 - 155) / 155] x 100
Subtract the new number by the original number
204 - 155 = 49
49 ÷ 155 = 0.3161290322580645
0.3161290322580645 x 100 = 31.61%