-7.74% is the change from 168 to 155
Calculation steps:
[( 155 - 168 ) ÷ 168] x 100 = -7.74%
Formula
Percentage change = [(155 - 168) / 168] x 100
Subtract the new number by the original number
155 - 168 = -13
-13 ÷ 168 = -0.07738095238095238
-0.07738095238095238 x 100 = -7.74%