-4.51% is the change from 399 to 381
Calculation steps:
[( 381 - 399 ) ÷ 399] x 100 = -4.51%
Formula
Percentage change = [(381 - 399) / 399] x 100
Subtract the new number by the original number
381 - 399 = -18
-18 ÷ 399 = -0.045112781954887216
-0.045112781954887216 x 100 = -4.51%