81.28% is the change from 454 to 823
Calculation steps:
[( 823 - 454 ) ÷ 454] x 100 = 81.28%
Formula
Percentage change = [(823 - 454) / 454] x 100
Subtract the new number by the original number
823 - 454 = 369
369 ÷ 454 = 0.8127753303964758
0.8127753303964758 x 100 = 81.28%