-90.95% is the change from 199 to 18
Calculation steps:
[( 18 - 199 ) ÷ 199] x 100 = -90.95%
Formula
Percentage change = [(18 - 199) / 199] x 100
Subtract the new number by the original number
18 - 199 = -181
-181 ÷ 199 = -0.9095477386934674
-0.9095477386934674 x 100 = -90.95%