78.73% is the change from 456 to 815
Calculation steps:
[( 815 - 456 ) ÷ 456] x 100 = 78.73%
Formula
Percentage change = [(815 - 456) / 456] x 100
Subtract the new number by the original number
815 - 456 = 359
359 ÷ 456 = 0.7872807017543859
0.7872807017543859 x 100 = 78.73%