3.14% is the change from 637 to 657
Calculation steps:
[( 657 - 637 ) ÷ 637] x 100 = 3.14%
Formula
Percentage change = [(657 - 637) / 637] x 100
Subtract the new number by the original number
657 - 637 = 20
20 ÷ 637 = 0.03139717425431711
0.03139717425431711 x 100 = 3.14%