-20.45% is the change from 665 to 529
Calculation steps:
[( 529 - 665 ) ÷ 665] x 100 = -20.45%
Formula
Percentage change = [(529 - 665) / 665] x 100
Subtract the new number by the original number
529 - 665 = -136
-136 ÷ 665 = -0.20451127819548873
-0.20451127819548873 x 100 = -20.45%