-6.5% is the change from 123 to 115
Calculation steps:
[( 115 - 123 ) ÷ 123] x 100 = -6.5%
Formula
Percentage change = [(115 - 123) / 123] x 100
Subtract the new number by the original number
115 - 123 = -8
-8 ÷ 123 = -0.06504065040650407
-0.06504065040650407 x 100 = -6.5%