6683.33% is the change from 12 to 814
Calculation steps:
[( 814 - 12 ) ÷ 12] x 100 = 6683.33%
Formula
Percentage change = [(814 - 12) / 12] x 100
Subtract the new number by the original number
814 - 12 = 802
802 ÷ 12 = 66.83333333333333
66.83333333333333 x 100 = 6683.33%