21.84% is the change from 673 to 820
Calculation steps:
[( 820 - 673 ) ÷ 673] x 100 = 21.84%
Formula
Percentage change = [(820 - 673) / 673] x 100
Subtract the new number by the original number
820 - 673 = 147
147 ÷ 673 = 0.21842496285289748
0.21842496285289748 x 100 = 21.84%