70.55% is the change from 455 to 776
Calculation steps:
[( 776 - 455 ) ÷ 455] x 100 = 70.55%
Formula
Percentage change = [(776 - 455) / 455] x 100
Subtract the new number by the original number
776 - 455 = 321
321 ÷ 455 = 0.7054945054945055
0.7054945054945055 x 100 = 70.55%