-99.49% is the change from 391 to 2
Calculation steps:
[( 2 - 391 ) ÷ 391] x 100 = -99.49%
Formula
Percentage change = [(2 - 391) / 391] x 100
Subtract the new number by the original number
2 - 391 = -389
-389 ÷ 391 = -0.9948849104859335
-0.9948849104859335 x 100 = -99.49%