27.93% is the change from 641 to 820
Calculation steps:
[( 820 - 641 ) ÷ 641] x 100 = 27.93%
Formula
Percentage change = [(820 - 641) / 641] x 100
Subtract the new number by the original number
820 - 641 = 179
179 ÷ 641 = 0.2792511700468019
0.2792511700468019 x 100 = 27.93%