-1.52% is the change from 656 to 646
Calculation steps:
[( 646 - 656 ) ÷ 656] x 100 = -1.52%
Formula
Percentage change = [(646 - 656) / 656] x 100
Subtract the new number by the original number
646 - 656 = -10
-10 ÷ 656 = -0.01524390243902439
-0.01524390243902439 x 100 = -1.52%