161.29% is the change from 310 to 810
Calculation steps:
[( 810 - 310 ) ÷ 310] x 100 = 161.29%
Formula
Percentage change = [(810 - 310) / 310] x 100
Subtract the new number by the original number
810 - 310 = 500
500 ÷ 310 = 1.6129032258064515
1.6129032258064515 x 100 = 161.29%