Carbon is found to form two oxides, which contain `42.9%` and `27.3%` if carbon respectively. Show that these figures illustrate the law of multiple proportions.

Explanation

To illustrate the law of multiple proportions using the given percentages of carbon in two oxides, we will follow these steps:

### Step 1: Identify the percentages of carbon and oxygen in each oxide.
- For the first oxide, the percentage of carbon is **42.9%**.
- For the second oxide, the percentage of carbon is **27.3%**.

### Step 2: Calculate the percentage of oxygen in each oxide.
- The percentage of oxygen in the first oxide can be calculated as:
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