68.13% is the change from 455 to 765
Calculation steps:
[( 765 - 455 ) ÷ 455] x 100 = 68.13%
Formula
Percentage change = [(765 - 455) / 455] x 100
Subtract the new number by the original number
765 - 455 = 310
310 ÷ 455 = 0.6813186813186813
0.6813186813186813 x 100 = 68.13%