-5.18% is the change from 657 to 623
Calculation steps:
[( 623 - 657 ) ÷ 657] x 100 = -5.18%
Formula
Percentage change = [(623 - 657) / 657] x 100
Subtract the new number by the original number
623 - 657 = -34
-34 ÷ 657 = -0.0517503805175038
-0.0517503805175038 x 100 = -5.18%