-90.45% is the change from 199 to 19
Calculation steps:
[( 19 - 199 ) ÷ 199] x 100 = -90.45%
Formula
Percentage change = [(19 - 199) / 199] x 100
Subtract the new number by the original number
19 - 199 = -180
-180 ÷ 199 = -0.9045226130653267
-0.9045226130653267 x 100 = -90.45%