-1.82% is the change from 661 to 649
Calculation steps:
[( 649 - 661 ) ÷ 661] x 100 = -1.82%
Formula
Percentage change = [(649 - 661) / 661] x 100
Subtract the new number by the original number
649 - 661 = -12
-12 ÷ 661 = -0.018154311649016642
-0.018154311649016642 x 100 = -1.82%