163.55% is the change from 310 to 817
Calculation steps:
[( 817 - 310 ) ÷ 310] x 100 = 163.55%
Formula
Percentage change = [(817 - 310) / 310] x 100
Subtract the new number by the original number
817 - 310 = 507
507 ÷ 310 = 1.635483870967742
1.635483870967742 x 100 = 163.55%