-3.24% is the change from 679 to 657
Calculation steps:
[( 657 - 679 ) ÷ 679] x 100 = -3.24%
Formula
Percentage change = [(657 - 679) / 679] x 100
Subtract the new number by the original number
657 - 679 = -22
-22 ÷ 679 = -0.03240058910162003
-0.03240058910162003 x 100 = -3.24%