-68.07% is the change from 642 to 205
Calculation steps:
[( 205 - 642 ) ÷ 642] x 100 = -68.07%
Formula
Percentage change = [(205 - 642) / 642] x 100
Subtract the new number by the original number
205 - 642 = -437
-437 ÷ 642 = -0.6806853582554517
-0.6806853582554517 x 100 = -68.07%