26.74% is the change from 647 to 820
Calculation steps:
[( 820 - 647 ) ÷ 647] x 100 = 26.74%
Formula
Percentage change = [(820 - 647) / 647] x 100
Subtract the new number by the original number
820 - 647 = 173
173 ÷ 647 = 0.26738794435857804
0.26738794435857804 x 100 = 26.74%