-40.9% is the change from 643 to 380
Calculation steps:
[( 380 - 643 ) ÷ 643] x 100 = -40.9%
Formula
Percentage change = [(380 - 643) / 643] x 100
Subtract the new number by the original number
380 - 643 = -263
-263 ÷ 643 = -0.40902021772939345
-0.40902021772939345 x 100 = -40.9%