151.63% is the change from 306 to 770
Calculation steps:
[( 770 - 306 ) ÷ 306] x 100 = 151.63%
Formula
Percentage change = [(770 - 306) / 306] x 100
Subtract the new number by the original number
770 - 306 = 464
464 ÷ 306 = 1.5163398692810457
1.5163398692810457 x 100 = 151.63%