273.79% is the change from 206 to 770
Calculation steps:
[( 770 - 206 ) ÷ 206] x 100 = 273.79%
Formula
Percentage change = [(770 - 206) / 206] x 100
Subtract the new number by the original number
770 - 206 = 564
564 ÷ 206 = 2.737864077669903
2.737864077669903 x 100 = 273.79%