-3.72% is the change from 403 to 388
Calculation steps:
[( 388 - 403 ) ÷ 403] x 100 = -3.72%
Formula
Percentage change = [(388 - 403) / 403] x 100
Subtract the new number by the original number
388 - 403 = -15
-15 ÷ 403 = -0.03722084367245657
-0.03722084367245657 x 100 = -3.72%