166.01% is the change from 306 to 814
Calculation steps:
[( 814 - 306 ) ÷ 306] x 100 = 166.01%
Formula
Percentage change = [(814 - 306) / 306] x 100
Subtract the new number by the original number
814 - 306 = 508
508 ÷ 306 = 1.6601307189542485
1.6601307189542485 x 100 = 166.01%