-6.71% is the change from 149 to 139
Calculation steps:
[( 139 - 149 ) ÷ 149] x 100 = -6.71%
Formula
Percentage change = [(139 - 149) / 149] x 100
Subtract the new number by the original number
139 - 149 = -10
-10 ÷ 149 = -0.06711409395973154
-0.06711409395973154 x 100 = -6.71%