2.39      1.79       =100-(1.79/2.39*100)=>  which is 25.1% decrease

6.11      -3.73      =100-(-3.73/6.11*100) which is 161% but should be -161%

-2.1       0.6       =100-(-3.73/6.11*100) which is 128.6% ??? is it?