377.19% is the change from 171 to 816
Calculation steps:
[( 816 - 171 ) ÷ 171] x 100 = 377.19%
Formula
Percentage change = [(816 - 171) / 171] x 100
Subtract the new number by the original number
816 - 171 = 645
645 ÷ 171 = 3.7719298245614037
3.7719298245614037 x 100 = 377.19%