-47.51% is the change from 642 to 337
Calculation steps:
[( 337 - 642 ) ÷ 642] x 100 = -47.51%
Formula
Percentage change = [(337 - 642) / 642] x 100
Subtract the new number by the original number
337 - 642 = -305
-305 ÷ 642 = -0.4750778816199377
-0.4750778816199377 x 100 = -47.51%