38900% is the change from 2 to 780
Calculation steps:
[( 780 - 2 ) ÷ 2] x 100 = 38900%
Formula
Percentage change = [(780 - 2) / 2] x 100
Subtract the new number by the original number
780 - 2 = 778
778 ÷ 2 = 389
389 x 100 = 38900%
Example