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To solve the problem of determining the percentage of letters that are not vowels, we can begin by analyzing the bar chart you provided. Here's the breakdown of vowel counts from the chart, based on the approximate values from the graph:

- \( a \approx 20,000 \)
- \( e \approx 35,000 \)
- \( i \approx 10,000 \)
- \( o \approx 25,000 \)
- \( u \approx 10,000 \)

### Step 1: Calculate the total number of vowels.
We sum the counts of all the vowels:

\[
\text{Total Vowels} = 20,000 + 35,000 + 10,000 + 25,000 + 10,000 = 100,000
\]

### Step 2: Calculate the number of non-vowel letters.
Since the novel contains 200,000 letters in total, the number of non-vowel letters is:

\[
\text{Non-vowels} = 200,000 - 100,000 = 100,000
\]

### Step 3: Calculate the percentage of non-vowel letters.
The percentage of letters that are not vowels is:

\[
\text{Percentage of non-vowels} = \left( \frac{100,000}{200,000} \right) \times 100 = 50\%
\]

Thus, **50% of the letters in the mystery novel are not vowels**.

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Would you like any further details on this problem, or do you have any additional questions?

Here are five related questions to expand your understanding:
1. What percentage of the letters in the novel are vowels?
2. How would the percentage change if the total letter count were different but the vowel distribution remained the same?
3. What is the ratio of vowel letters to non-vowel letters?
4. How many vowels would be in the novel if the total letter count was 300,000 instead of 200,000?
5. If the count of 'e' were increased by 5,000, how would that impact the percentage of non-vowel letters?

**Tip:** When dealing with percentages, always double-check the total and the breakdown of components to ensure accuracy in your calculations.

A mystery novel contains 200,000 letters. What percentage of these letters are not vowels?

Determine what percentage of the 200,000 letters in a mystery novel are not vowels. This math problem involves basic percentage calculations and counts of vowel letters such as a, e, i, o, and u.

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