-23.95% is the change from 643 to 489
Calculation steps:
[( 489 - 643 ) ÷ 643] x 100 = -23.95%
Formula
Percentage change = [(489 - 643) / 643] x 100
Subtract the new number by the original number
489 - 643 = -154
-154 ÷ 643 = -0.23950233281493002
-0.23950233281493002 x 100 = -23.95%