-14.81% is the change from 135 to 115
Calculation steps:
[( 115 - 135 ) ÷ 135] x 100 = -14.81%
Formula
Percentage change = [(115 - 135) / 135] x 100
Subtract the new number by the original number
115 - 135 = -20
-20 ÷ 135 = -0.14814814814814814
-0.14814814814814814 x 100 = -14.81%