-81.8% is the change from 945 to 172
Calculation steps:
[( 172 - 945 ) ÷ 945] x 100 = -81.8%
Formula
Percentage change = [(172 - 945) / 945] x 100
Subtract the new number by the original number
172 - 945 = -773
-773 ÷ 945 = -0.817989417989418
-0.817989417989418 x 100 = -81.8%