-12.31% is the change from 642 to 563
Calculation steps:
[( 563 - 642 ) ÷ 642] x 100 = -12.31%
Formula
Percentage change = [(563 - 642) / 642] x 100
Subtract the new number by the original number
563 - 642 = -79
-79 ÷ 642 = -0.12305295950155763
-0.12305295950155763 x 100 = -12.31%