163.23% is the change from 310 to 816
Calculation steps:
[( 816 - 310 ) ÷ 310] x 100 = 163.23%
Formula
Percentage change = [(816 - 310) / 310] x 100
Subtract the new number by the original number
816 - 310 = 506
506 ÷ 310 = 1.632258064516129
1.632258064516129 x 100 = 163.23%