-23.33% is the change from 150 to 115
Calculation steps:
[( 115 - 150 ) ÷ 150] x 100 = -23.33%
Formula
Percentage change = [(115 - 150) / 150] x 100
Subtract the new number by the original number
115 - 150 = -35
-35 ÷ 150 = -0.23333333333333334
-0.23333333333333334 x 100 = -23.33%