427.1% is the change from 155 to 817
Calculation steps:
[( 817 - 155 ) ÷ 155] x 100 = 427.1%
Formula
Percentage change = [(817 - 155) / 155] x 100
Subtract the new number by the original number
817 - 155 = 662
662 ÷ 155 = 4.2709677419354835
4.2709677419354835 x 100 = 427.1%