Part A
Area of the bathroom floor = Length X Width
[tex]\begin{gathered} \text{Length = 4}\frac{2}{5}\text{ = }\frac{22}{5} \\ \text{Width = 6}\frac{3}{4}\text{ = }\frac{27}{4} \\ \text{Area = L x B} \\ =\text{ }\frac{22}{5}\text{ X }\frac{27}{4} \\ =\text{ }\frac{187}{10} \end{gathered}[/tex]Part B
Number of boxes of tiles
[tex]\begin{gathered} =\text{ }\frac{\frac{187}{10}}{5} \\ =\text{ }\frac{187}{10\text{ X 5}} \\ =\text{ }\frac{187}{50} \\ =3.74 \\ =\text{ 4 boxes} \end{gathered}[/tex]