148.39% is the change from 310 to 770
Calculation steps:
[( 770 - 310 ) ÷ 310] x 100 = 148.39%
Formula
Percentage change = [(770 - 310) / 310] x 100
Subtract the new number by the original number
770 - 310 = 460
460 ÷ 310 = 1.4838709677419355
1.4838709677419355 x 100 = 148.39%