-0.15% is the change from 657 to 656
Calculation steps:
[( 656 - 657 ) ÷ 657] x 100 = -0.15%
Formula
Percentage change = [(656 - 657) / 657] x 100
Subtract the new number by the original number
656 - 657 = -1
-1 ÷ 657 = -0.0015220700152207
-0.0015220700152207 x 100 = -0.15%