6850% is the change from 12 to 834
Calculation steps:
[( 834 - 12 ) ÷ 12] x 100 = 6850%
Formula
Percentage change = [(834 - 12) / 12] x 100
Subtract the new number by the original number
834 - 12 = 822
822 ÷ 12 = 68.5
68.5 x 100 = 6850%
Example