-4.09% is the change from 685 to 657
Calculation steps:
[( 657 - 685 ) ÷ 685] x 100 = -4.09%
Formula
Percentage change = [(657 - 685) / 685] x 100
Subtract the new number by the original number
657 - 685 = -28
-28 ÷ 685 = -0.040875912408759124
-0.040875912408759124 x 100 = -4.09%