200% is the change from 260 to 780
Calculation steps:
[( 780 - 260 ) ÷ 260] x 100 = 200%
Formula
Percentage change = [(780 - 260) / 260] x 100
Subtract the new number by the original number
780 - 260 = 520
520 ÷ 260 = 2
2 x 100 = 200%
Example