-86.63% is the change from 172 to 23
Calculation steps:
[( 23 - 172 ) ÷ 172] x 100 = -86.63%
Formula
Percentage change = [(23 - 172) / 172] x 100
Subtract the new number by the original number
23 - 172 = -149
-149 ÷ 172 = -0.8662790697674418
-0.8662790697674418 x 100 = -86.63%