390.36% is the change from 166 to 814
Calculation steps:
[( 814 - 166 ) ÷ 166] x 100 = 390.36%
Formula
Percentage change = [(814 - 166) / 166] x 100
Subtract the new number by the original number
814 - 166 = 648
648 ÷ 166 = 3.9036144578313254
3.9036144578313254 x 100 = 390.36%