394.15% is the change from 171 to 845
Calculation steps:
[( 845 - 171 ) ÷ 171] x 100 = 394.15%
Formula
Percentage change = [(845 - 171) / 171] x 100
Subtract the new number by the original number
845 - 171 = 674
674 ÷ 171 = 3.9415204678362574
3.9415204678362574 x 100 = 394.15%