-99.75% is the change from 405 to 1
Calculation steps:
[( 1 - 405 ) ÷ 405] x 100 = -99.75%
Formula
Percentage change = [(1 - 405) / 405] x 100
Subtract the new number by the original number
1 - 405 = -404
-404 ÷ 405 = -0.9975308641975309
-0.9975308641975309 x 100 = -99.75%