-85.88% is the change from 170 to 24
Calculation steps:
[( 24 - 170 ) ÷ 170] x 100 = -85.88%
Formula
Percentage change = [(24 - 170) / 170] x 100
Subtract the new number by the original number
24 - 170 = -146
-146 ÷ 170 = -0.8588235294117647
-0.8588235294117647 x 100 = -85.88%