6400% is the change from 12 to 780
Calculation steps:
[( 780 - 12 ) ÷ 12] x 100 = 6400%
Formula
Percentage change = [(780 - 12) / 12] x 100
Subtract the new number by the original number
780 - 12 = 768
768 ÷ 12 = 64
64 x 100 = 6400%
Example