5/14+5/4+9/14+1/4
=45/28+9/14+1/4
=9/4+1/4
=5/2
5/14+5/4+9/14+1/4=(5/14+9/14)+(5/4+1/4)=1+6/4=10/4=5/2
=5/14+9/14+5/4+1/4=14/14+6/4=1+3/2=5/2=2.5