So we have to subtract from the original length:
(12 three fourths foot) - (3/8 of a foot) - (3/8 of a foot) - (5/6 foot)
= (12 3/4) - 3/8 - 3/8 - 5/6
= (48/4 + 3/4) - 6/8 - 5/6
= 51/4 - 3/4 - 5/6
= 48/4 - 5/6
= 12 - 5/6
= 72/6 - 5/6
= 67/6
that is the new streammer length 67/6 foot or 11 1/6 foot
