-95.4% is the change from 391 to 18
Calculation steps:
[( 18 - 391 ) ÷ 391] x 100 = -95.4%
Formula
Percentage change = [(18 - 391) / 391] x 100
Subtract the new number by the original number
18 - 391 = -373
-373 ÷ 391 = -0.9539641943734015
-0.9539641943734015 x 100 = -95.4%