-94.87% is the change from 409 to 21
Calculation steps:
[( 21 - 409 ) ÷ 409] x 100 = -94.87%
Formula
Percentage change = [(21 - 409) / 409] x 100
Subtract the new number by the original number
21 - 409 = -388
-388 ÷ 409 = -0.9486552567237164
-0.9486552567237164 x 100 = -94.87%