-94.67% is the change from 394 to 21
Calculation steps:
[( 21 - 394 ) ÷ 394] x 100 = -94.67%
Formula
Percentage change = [(21 - 394) / 394] x 100
Subtract the new number by the original number
21 - 394 = -373
-373 ÷ 394 = -0.9467005076142132
-0.9467005076142132 x 100 = -94.67%