4.09% is the change from 635 to 661
Calculation steps:
[( 661 - 635 ) ÷ 635] x 100 = 4.09%
Formula
Percentage change = [(661 - 635) / 635] x 100
Subtract the new number by the original number
661 - 635 = 26
26 ÷ 635 = 0.04094488188976378
0.04094488188976378 x 100 = 4.09%