So, if the total amount of the flower was x
then he used \(\frac{1}{5}x\) for cooking and \(\frac{4}{5}x\) was left
then he used \(\frac{4*3}{5*4}x\)= \(\frac{3}{5}x\) to make bread and \(\frac{4}{5}x-\frac{3}{5}x\)= \(\frac{1}{5}x\) was left.
so the \(\frac{1}{5}x\) was packed into 5 containers, each container had
\(\frac{1}{5*5}x\), which is \(\frac{1}{25}x\) of the total amount