138.39% is the change from 323 to 770
Calculation steps:
[( 770 - 323 ) ÷ 323] x 100 = 138.39%
Formula
Percentage change = [(770 - 323) / 323] x 100
Subtract the new number by the original number
770 - 323 = 447
447 ÷ 323 = 1.3839009287925697
1.3839009287925697 x 100 = 138.39%