6700% is the change from 12 to 816
Calculation steps:
[( 816 - 12 ) ÷ 12] x 100 = 6700%
Formula
Percentage change = [(816 - 12) / 12] x 100
Subtract the new number by the original number
816 - 12 = 804
804 ÷ 12 = 67
67 x 100 = 6700%
Example