-19.9% is the change from 191 to 153
Calculation steps:
[( 153 - 191 ) ÷ 191] x 100 = -19.9%
Formula
Percentage change = [(153 - 191) / 191] x 100
Subtract the new number by the original number
153 - 191 = -38
-38 ÷ 191 = -0.19895287958115182
-0.19895287958115182 x 100 = -19.9%