Jeanie has a 3/4 piece of ribbon. she needs one 3/8 yard piece and a 1/2 yard piece. can she cut the piece of ribbon into the two smaller pieces? explain

Jeanie cannot cut the piece of ribbon into two smaller pieces. 

if you multiply the numerator and the denominator for  by 2. 
She needs  yard piece, which is  if you multiply the numerator and the denominator for .
Now that all the numbers have the same denominator, you can subtract the numerators which is: 6 - 4 - 3 = -1
This means that she cannot cut the ribbon into two smaller pieces.

~I hope this helped!!