cost divided by length of fabric
convert to impropert fractions
2 and 1/2=2+1/2=4/2+1/2=5/2
cost/length=[tex]\frac{15}{\frac{5}{2}}[/tex]
times the whole thing by [tex]\frac{{2}{5}}{\frac{2}{5}}[/tex]
we get
[tex]\frac{\frac{30}{5}}{\frac{10}{10}}=[/tex]
[tex]\frac{6}{1}=6[/tex]
cost was $6 per yard
