-10.85% is the change from 129 to 115
Calculation steps:
[( 115 - 129 ) ÷ 129] x 100 = -10.85%
Formula
Percentage change = [(115 - 129) / 129] x 100
Subtract the new number by the original number
115 - 129 = -14
-14 ÷ 129 = -0.10852713178294573
-0.10852713178294573 x 100 = -10.85%