Answer: He would need \(3\dfrac{1}{3}\) 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 = \(\dfrac{4}{5}\)
Fraction of mashed potatoes he ended up using = \(2\dfrac{4}{6}=2\dfrac{2}{3}=\dfrac{8}{3}\)
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
\(\dfrac{8}{3}\div \dfrac{4}{5}\\\\=\dfrac{8}{3}\times \dfrac{5}{4}\\\\=\dfrac{10}{3}\\\\=3\dfrac{1}{3}\)
Hence, he would need \(3\dfrac{1}{3}\) pounds to fill the container all the way.
