Let u make the first box x and the second box y.
If there is a proportional relationship between the number of bananas and their weights, it means that:
[tex]\frac{2}{x}=\frac{6}{0.72}=\frac{15}{y}[/tex]We can take the first pair and solve for x as follows:
[tex]\begin{gathered} \frac{2}{x}=\frac{6}{0.72} \\ 6x=2\times0.72=1.44 \\ x=\frac{1.44}{6} \\ x=0.24 \end{gathered}[/tex]We can solve for y in the same manner:
[tex]\begin{gathered} \frac{6}{0.72}=\frac{15}{y} \\ 6y=15\times0.72=10.8 \\ y=\frac{10.8}{6} \\ y=1.8 \end{gathered}[/tex]Therefore, the boxes are filled as shown below: