393.9% is the change from 164 to 810
Calculation steps:
[( 810 - 164 ) ÷ 164] x 100 = 393.9%
Formula
Percentage change = [(810 - 164) / 164] x 100
Subtract the new number by the original number
810 - 164 = 646
646 ÷ 164 = 3.9390243902439024
3.9390243902439024 x 100 = 393.9%