-11.5% is the change from 113 to 100
Calculation steps:
[( 100 - 113 ) ÷ 113] x 100 = -11.5%
Formula
Percentage change = [(100 - 113) / 113] x 100
Subtract the new number by the original number
100 - 113 = -13
-13 ÷ 113 = -0.11504424778761062
-0.11504424778761062 x 100 = -11.5%