-0,26/(-1*3) =
= 13/50*1/3 =
13/150
0,31/(-2 3/7) =
= 31/100 + (-17/7) =
= -31/100 * 7/17 =
-217/1700
-0,26/(-1*3) =
= 13/50*1/3 =
13/150
0,31/(-2 3/7) =
= 31/100 + (-17/7) =
= -31/100 * 7/17 =
-217/1700