128.07% is the change from 171 to 390
Calculation steps:
[( 390 - 171 ) ÷ 171] x 100 = 128.07%
Formula
Percentage change = [(390 - 171) / 171] x 100
Subtract the new number by the original number
390 - 171 = 219
219 ÷ 171 = 1.280701754385965
1.280701754385965 x 100 = 128.07%