-4.23% is the change from 686 to 657
Calculation steps:
[( 657 - 686 ) ÷ 686] x 100 = -4.23%
Formula
Percentage change = [(657 - 686) / 686] x 100
Subtract the new number by the original number
657 - 686 = -29
-29 ÷ 686 = -0.04227405247813411
-0.04227405247813411 x 100 = -4.23%