387.95% is the change from 166 to 810
Calculation steps:
[( 810 - 166 ) ÷ 166] x 100 = 387.95%
Formula
Percentage change = [(810 - 166) / 166] x 100
Subtract the new number by the original number
810 - 166 = 644
644 ÷ 166 = 3.8795180722891565
3.8795180722891565 x 100 = 387.95%