3.55% is the change from 647 to 670
Calculation steps:
[( 670 - 647 ) ÷ 647] x 100 = 3.55%
Formula
Percentage change = [(670 - 647) / 647] x 100
Subtract the new number by the original number
670 - 647 = 23
23 ÷ 647 = 0.03554868624420402
0.03554868624420402 x 100 = 3.55%