-81.69% is the change from 945 to 173
Calculation steps:
[( 173 - 945 ) ÷ 945] x 100 = -81.69%
Formula
Percentage change = [(173 - 945) / 945] x 100
Subtract the new number by the original number
173 - 945 = -772
-772 ÷ 945 = -0.816931216931217
-0.816931216931217 x 100 = -81.69%