-1.52% is the change from 657 to 647
Calculation steps:
[( 647 - 657 ) ÷ 657] x 100 = -1.52%
Formula
Percentage change = [(647 - 657) / 657] x 100
Subtract the new number by the original number
647 - 657 = -10
-10 ÷ 657 = -0.015220700152207
-0.015220700152207 x 100 = -1.52%