-30.79% is the change from 643 to 445
Calculation steps:
[( 445 - 643 ) ÷ 643] x 100 = -30.79%
Formula
Percentage change = [(445 - 643) / 643] x 100
Subtract the new number by the original number
445 - 643 = -198
-198 ÷ 643 = -0.30793157076205285
-0.30793157076205285 x 100 = -30.79%