6891.67% is the change from 12 to 839
Calculation steps:
[( 839 - 12 ) ÷ 12] x 100 = 6891.67%
Formula
Percentage change = [(839 - 12) / 12] x 100
Subtract the new number by the original number
839 - 12 = 827
827 ÷ 12 = 68.91666666666667
68.91666666666667 x 100 = 6891.67%