-18.54% is the change from 642 to 523
Calculation steps:
[( 523 - 642 ) ÷ 642] x 100 = -18.54%
Formula
Percentage change = [(523 - 642) / 642] x 100
Subtract the new number by the original number
523 - 642 = -119
-119 ÷ 642 = -0.1853582554517134
-0.1853582554517134 x 100 = -18.54%