21.73% is the change from 819 to 997
Calculation steps:
[( 997 - 819 ) ÷ 819] x 100 = 21.73%
Formula
Percentage change = [(997 - 819) / 819] x 100
Subtract the new number by the original number
997 - 819 = 178
178 ÷ 819 = 0.21733821733821734
0.21733821733821734 x 100 = 21.73%