-94.81% is the change from 405 to 21
Calculation steps:
[( 21 - 405 ) ÷ 405] x 100 = -94.81%
Formula
Percentage change = [(21 - 405) / 405] x 100
Subtract the new number by the original number
21 - 405 = -384
-384 ÷ 405 = -0.9481481481481482
-0.9481481481481482 x 100 = -94.81%