-81.28% is the change from 919 to 172
Calculation steps:
[( 172 - 919 ) ÷ 919] x 100 = -81.28%
Formula
Percentage change = [(172 - 919) / 919] x 100
Subtract the new number by the original number
172 - 919 = -747
-747 ÷ 919 = -0.8128400435255713
-0.8128400435255713 x 100 = -81.28%