-9.74% is the change from 154 to 139
Calculation steps:
[( 139 - 154 ) ÷ 154] x 100 = -9.74%
Formula
Percentage change = [(139 - 154) / 154] x 100
Subtract the new number by the original number
139 - 154 = -15
-15 ÷ 154 = -0.09740259740259741
-0.09740259740259741 x 100 = -9.74%