-6.51% is the change from 661 to 618
Calculation steps:
[( 618 - 661 ) ÷ 661] x 100 = -6.51%
Formula
Percentage change = [(618 - 661) / 661] x 100
Subtract the new number by the original number
618 - 661 = -43
-43 ÷ 661 = -0.06505295007564296
-0.06505295007564296 x 100 = -6.51%