Answer :

Let's complete the ratio table to convert the units of measure from ounces to grams or grams to ounces by following these steps:

1. Convert 3 ounces to grams:
2. Convert 140 grams to ounces:

### Step-by-Step Solution

1. Convert 3 ounces to grams:

- We know that 1 ounce is equal to 28 grams. Use this conversion factor to find out the number of grams in 3 ounces.

- We multiply the number of ounces (3) by the conversion factor (28 grams per ounce):
[tex]\[ 3 \, \text{ounces} \times 28 \, \text{grams/ounce} = 84 \, \text{grams} \][/tex]

So, 3 ounces is equal to 84 grams.

2. Convert 140 grams to ounces:

- To convert grams to ounces, we use the conversion factor that 1 ounce is equivalent to 28 grams. Thus, to find out the number of ounces in 140 grams, we divide the number of grams by the conversion factor (28 grams per ounce):
[tex]\[ 140 \, \text{grams} \div 28 \, \text{grams/ounce} = 5 \, \text{ounces} \][/tex]

So, 140 grams is equal to 5 ounces.

### Completed Ratio Table
[tex]\[ \begin{tabular}{cc} \text{Ounces} & \text{Grams} \\ 1 & 28 \\ 3 & 84 \\ 5 & 140 \end{tabular} \][/tex]

Therefore, the completed ratio table is:
[tex]\[ \begin{tabular}{cc} \text{Ounces} & \text{Grams} \\ 1 & 28 \\ 3 & 84 \\ 5 & 140 \end{tabular} \][/tex]