-32.81% is the change from 643 to 432
Calculation steps:
[( 432 - 643 ) ÷ 643] x 100 = -32.81%
Formula
Percentage change = [(432 - 643) / 643] x 100
Subtract the new number by the original number
432 - 643 = -211
-211 ÷ 643 = -0.328149300155521
-0.328149300155521 x 100 = -32.81%