280.49% is the change from 205 to 780
Calculation steps:
[( 780 - 205 ) ÷ 205] x 100 = 280.49%
Formula
Percentage change = [(780 - 205) / 205] x 100
Subtract the new number by the original number
780 - 205 = 575
575 ÷ 205 = 2.8048780487804876
2.8048780487804876 x 100 = 280.49%