(-3/8-2 5/12):5 5/12
(-3/8-2 5/12):5 5/12=(-(3/8+2 5/12)):5 5/12=(-(9/24+2 10/24):5 5/12=-2 19/24:5 5/12=-2 19/24: 5 10/24=-67/24:130/24=-67/24*24/130=-67/130 как-то так...