20.91% is the change from 679 to 821
Calculation steps:
[( 821 - 679 ) ÷ 679] x 100 = 20.91%
Formula
Percentage change = [(821 - 679) / 679] x 100
Subtract the new number by the original number
821 - 679 = 142
142 ÷ 679 = 0.20913107511045656
0.20913107511045656 x 100 = 20.91%