185.19% is the change from 270 to 770
Calculation steps:
[( 770 - 270 ) ÷ 270] x 100 = 185.19%
Formula
Percentage change = [(770 - 270) / 270] x 100
Subtract the new number by the original number
770 - 270 = 500
500 ÷ 270 = 1.8518518518518519
1.8518518518518519 x 100 = 185.19%