-1.65% is the change from 668 to 657
Calculation steps:
[( 657 - 668 ) ÷ 668] x 100 = -1.65%
Formula
Percentage change = [(657 - 668) / 668] x 100
Subtract the new number by the original number
657 - 668 = -11
-11 ÷ 668 = -0.016467065868263474
-0.016467065868263474 x 100 = -1.65%