-17.6% is the change from 642 to 529
Calculation steps:
[( 529 - 642 ) ÷ 642] x 100 = -17.6%
Formula
Percentage change = [(529 - 642) / 642] x 100
Subtract the new number by the original number
529 - 642 = -113
-113 ÷ 642 = -0.17601246105919002
-0.17601246105919002 x 100 = -17.6%