-20.6% is the change from 529 to 420
Calculation steps:
[( 420 - 529 ) ÷ 529] x 100 = -20.6%
Formula
Percentage change = [(420 - 529) / 529] x 100
Subtract the new number by the original number
420 - 529 = -109
-109 ÷ 529 = -0.2060491493383743
-0.2060491493383743 x 100 = -20.6%