2.1/4+2.1/2=4.2/6
3.1/4+3.1/2=6.2/6
4.1/4+4.1/2=8.2/6
5.1/4+5.1/2=10.2/6
4.2/6+6.2/6= 10.4/12
8.2/6+10.2/6=18.4/12
(4.2/6+6.2/6) +(8.2/6+10.2/6) =28.8/24
2.1/4+2.1/2=4.2/6
3.1/4+3.1/2=6.2/6
4.1/4+4.1/2=8.2/6
5.1/4+5.1/2=10.2/6
4.2/6+6.2/6= 10.4/12
8.2/6+10.2/6=18.4/12
(4.2/6+6.2/6) +(8.2/6+10.2/6) =28.8/24