-81.2% is the change from 920 to 173
Calculation steps:
[( 173 - 920 ) ÷ 920] x 100 = -81.2%
Formula
Percentage change = [(173 - 920) / 920] x 100
Subtract the new number by the original number
173 - 920 = -747
-747 ÷ 920 = -0.8119565217391305
-0.8119565217391305 x 100 = -81.2%