-81.47% is the change from 923 to 171
Calculation steps:
[( 171 - 923 ) ÷ 923] x 100 = -81.47%
Formula
Percentage change = [(171 - 923) / 923] x 100
Subtract the new number by the original number
171 - 923 = -752
-752 ÷ 923 = -0.8147345612134345
-0.8147345612134345 x 100 = -81.47%