Answer: He would need [tex]3\dfrac{1}{3}[/tex] pounds to fill the container all the way.
Step-by-step explanation:
Since we have given that
Fraction of mashed potatoes he had to fill up a container = [tex]\dfrac{4}{5}[/tex]
Fraction of mashed potatoes he ended up using = [tex]2\dfrac{4}{6}=2\dfrac{2}{3}=\dfrac{8}{3}[/tex]
So, we need to find the number of pounds that he would need to fill the container all the way.
So, number of pounds would be
[tex]\dfrac{8}{3}\div \dfrac{4}{5}\\\\=\dfrac{8}{3}\times \dfrac{5}{4}\\\\=\dfrac{10}{3}\\\\=3\dfrac{1}{3}[/tex]
Hence, he would need [tex]3\dfrac{1}{3}[/tex] pounds to fill the container all the way.
