-41.21% is the change from 643 to 378
Calculation steps:
[( 378 - 643 ) ÷ 643] x 100 = -41.21%
Formula
Percentage change = [(378 - 643) / 643] x 100
Subtract the new number by the original number
378 - 643 = -265
-265 ÷ 643 = -0.4121306376360809
-0.4121306376360809 x 100 = -41.21%