71.43% is the change from 455 to 780
Calculation steps:
[( 780 - 455 ) ÷ 455] x 100 = 71.43%
Formula
Percentage change = [(780 - 455) / 455] x 100
Subtract the new number by the original number
780 - 455 = 325
325 ÷ 455 = 0.7142857142857143
0.7142857142857143 x 100 = 71.43%