-38.57% is the change from 643 to 395
Calculation steps:
[( 395 - 643 ) ÷ 643] x 100 = -38.57%
Formula
Percentage change = [(395 - 643) / 643] x 100
Subtract the new number by the original number
395 - 643 = -248
-248 ÷ 643 = -0.3856920684292379
-0.3856920684292379 x 100 = -38.57%