-0.99% is the change from 405 to 401
Calculation steps:
[( 401 - 405 ) ÷ 405] x 100 = -0.99%
Formula
Percentage change = [(401 - 405) / 405] x 100
Subtract the new number by the original number
401 - 405 = -4
-4 ÷ 405 = -0.009876543209876543
-0.009876543209876543 x 100 = -0.99%