3*7/8+5*3/4=
3*7/8=21/8=2.5/8
5*3/4=15/4=3.3/4
2.5/8+3.6/8=6.3/8
3*7/8+5*3/4=6.3/8
3*7/8+5*3/4=21/8+15/4=2,625+3.75=6.375