-94.99% is the change from 399 to 20
Calculation steps:
[( 20 - 399 ) ÷ 399] x 100 = -94.99%
Formula
Percentage change = [(20 - 399) / 399] x 100
Subtract the new number by the original number
20 - 399 = -379
-379 ÷ 399 = -0.949874686716792
-0.949874686716792 x 100 = -94.99%
Example