20.83% is the change from 821 to 992
Calculation steps:
[( 992 - 821 ) ÷ 821] x 100 = 20.83%
Formula
Percentage change = [(992 - 821) / 821] x 100
Subtract the new number by the original number
992 - 821 = 171
171 ÷ 821 = 0.20828258221680876
0.20828258221680876 x 100 = 20.83%