80.04% is the change from 456 to 821
Calculation steps:
[( 821 - 456 ) ÷ 456] x 100 = 80.04%
Formula
Percentage change = [(821 - 456) / 456] x 100
Subtract the new number by the original number
821 - 456 = 365
365 ÷ 456 = 0.8004385964912281
0.8004385964912281 x 100 = 80.04%