6658.33% is the change from 12 to 811
Calculation steps:
[( 811 - 12 ) ÷ 12] x 100 = 6658.33%
Formula
Percentage change = [(811 - 12) / 12] x 100
Subtract the new number by the original number
811 - 12 = 799
799 ÷ 12 = 66.58333333333333
66.58333333333333 x 100 = 6658.33%