-19.97% is the change from 661 to 529
Calculation steps:
[( 529 - 661 ) ÷ 661] x 100 = -19.97%
Formula
Percentage change = [(529 - 661) / 661] x 100
Subtract the new number by the original number
529 - 661 = -132
-132 ÷ 661 = -0.19969742813918306
-0.19969742813918306 x 100 = -19.97%