-95.64% is the change from 642 to 28
Calculation steps:
[( 28 - 642 ) ÷ 642] x 100 = -95.64%
Formula
Percentage change = [(28 - 642) / 642] x 100
Subtract the new number by the original number
28 - 642 = -614
-614 ÷ 642 = -0.956386292834891
-0.956386292834891 x 100 = -95.64%