74.58% is the change from 177 to 309
Calculation steps:
[( 309 - 177 ) ÷ 177] x 100 = 74.58%
Formula
Percentage change = [(309 - 177) / 177] x 100
Subtract the new number by the original number
309 - 177 = 132
132 ÷ 177 = 0.7457627118644068
0.7457627118644068 x 100 = 74.58%