-97.69% is the change from 173 to 4
Calculation steps:
[( 4 - 173 ) ÷ 173] x 100 = -97.69%
Formula
Percentage change = [(4 - 173) / 173] x 100
Subtract the new number by the original number
4 - 173 = -169
-169 ÷ 173 = -0.976878612716763
-0.976878612716763 x 100 = -97.69%