-88.37% is the change from 172 to 20
Calculation steps:
[( 20 - 172 ) ÷ 172] x 100 = -88.37%
Formula
Percentage change = [(20 - 172) / 172] x 100
Subtract the new number by the original number
20 - 172 = -152
-152 ÷ 172 = -0.8837209302325582
-0.8837209302325582 x 100 = -88.37%