-17.26% is the change from 168 to 139
Calculation steps:
[( 139 - 168 ) ÷ 168] x 100 = -17.26%
Formula
Percentage change = [(139 - 168) / 168] x 100
Subtract the new number by the original number
139 - 168 = -29
-29 ÷ 168 = -0.17261904761904762
-0.17261904761904762 x 100 = -17.26%