79.78% is the change from 455 to 818
Calculation steps:
[( 818 - 455 ) ÷ 455] x 100 = 79.78%
Formula
Percentage change = [(818 - 455) / 455] x 100
Subtract the new number by the original number
818 - 455 = 363
363 ÷ 455 = 0.7978021978021979
0.7978021978021979 x 100 = 79.78%