163.07% is the change from 306 to 805
Calculation steps:
[( 805 - 306 ) ÷ 306] x 100 = 163.07%
Formula
Percentage change = [(805 - 306) / 306] x 100
Subtract the new number by the original number
805 - 306 = 499
499 ÷ 306 = 1.630718954248366
1.630718954248366 x 100 = 163.07%