30.51% is the change from 177 to 231
Calculation steps:
[( 231 - 177 ) ÷ 177] x 100 = 30.51%
Formula
Percentage change = [(231 - 177) / 177] x 100
Subtract the new number by the original number
231 - 177 = 54
54 ÷ 177 = 0.3050847457627119
0.3050847457627119 x 100 = 30.51%