80.12% is the change from 171 to 308
Calculation steps:
[( 308 - 171 ) ÷ 171] x 100 = 80.12%
Formula
Percentage change = [(308 - 171) / 171] x 100
Subtract the new number by the original number
308 - 171 = 137
137 ÷ 171 = 0.8011695906432749
0.8011695906432749 x 100 = 80.12%