-99.23% is the change from 391 to 3
Calculation steps:
[( 3 - 391 ) ÷ 391] x 100 = -99.23%
Formula
Percentage change = [(3 - 391) / 391] x 100
Subtract the new number by the original number
3 - 391 = -388
-388 ÷ 391 = -0.9923273657289002
-0.9923273657289002 x 100 = -99.23%