3.4% is the change from 647 to 669
Calculation steps:
[( 669 - 647 ) ÷ 647] x 100 = 3.4%
Formula
Percentage change = [(669 - 647) / 647] x 100
Subtract the new number by the original number
669 - 647 = 22
22 ÷ 647 = 0.03400309119010819
0.03400309119010819 x 100 = 3.4%