To be able to compare the weight of the boxes, we need to have their weight in decimal form:
Box A --> 212.04 kilograms
Box B --> 212 1/4 kilograms
Convert 212 1/4 to decimal:
![\begin{gathered} \text{SINCE }(1)/(4)=0.25 \\ 212(1)/(4)=212.25 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/vzjdtm003cj4ry2lof59hqwsdftm3ay8l6.png)
Box B --> 212.25
We can see that the weight of box B is more than the weight of box A, so we discard options A and C.
To find how much more is the weight of box B, we subtract the quantities:
![212.25-212.04=0.21](https://img.qammunity.org/2023/formulas/mathematics/college/k9we6dte5r6rbrk8b4gpjvmyskk7ek6eex.png)
Answer: Box B weighs 0.21 of a kilogram more than box A