-5.22% is the change from 115 to 109
Calculation steps:
[( 109 - 115 ) ÷ 115] x 100 = -5.22%
Formula
Percentage change = [(109 - 115) / 115] x 100
Subtract the new number by the original number
109 - 115 = -6
-6 ÷ 115 = -0.05217391304347826
-0.05217391304347826 x 100 = -5.22%