-82.94% is the change from 170 to 29
Calculation steps:
[( 29 - 170 ) ÷ 170] x 100 = -82.94%
Formula
Percentage change = [(29 - 170) / 170] x 100
Subtract the new number by the original number
29 - 170 = -141
-141 ÷ 170 = -0.8294117647058824
-0.8294117647058824 x 100 = -82.94%