To simplify the given questions
Part A

To find the ratio, we will first have to convert the factors into the same units
We will convert 4kg to grams
So that we will have
![\begin{gathered} 1\operatorname{kg}=1000g \\ 4\operatorname{kg}=4000g \end{gathered}]()
Therefore

Next, we will have to reduce the ratios to the lowest term
Thus, the answer is

Part B

Since they have the same units, we will reduce the ratio to its lowest term
Therefore, the answer will be
