-0.61% is the change from 661 to 657
Calculation steps:
[( 657 - 661 ) ÷ 661] x 100 = -0.61%
Formula
Percentage change = [(657 - 661) / 661] x 100
Subtract the new number by the original number
657 - 661 = -4
-4 ÷ 661 = -0.006051437216338881
-0.006051437216338881 x 100 = -0.61%