-7.72% is the change from 661 to 610
Calculation steps:
[( 610 - 661 ) ÷ 661] x 100 = -7.72%
Formula
Percentage change = [(610 - 661) / 661] x 100
Subtract the new number by the original number
610 - 661 = -51
-51 ÷ 661 = -0.07715582450832073
-0.07715582450832073 x 100 = -7.72%