68.35% is the change from 455 to 766
Calculation steps:
[( 766 - 455 ) ÷ 455] x 100 = 68.35%
Formula
Percentage change = [(766 - 455) / 455] x 100
Subtract the new number by the original number
766 - 455 = 311
311 ÷ 455 = 0.6835164835164835
0.6835164835164835 x 100 = 68.35%