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To solve this problem:

We are asked to find the percentage of racers who did **not** complete the marathon.

### Total racers:
- 210 racers started the marathon.

### Number of racers who did not complete the marathon:
- 16 racers gave up.
- 6 racers were disqualified.

Therefore, the number of racers who did not complete the marathon is:
\[
16 + 6 = 22 \text{ racers}
\]

### Percentage of racers who did not complete the marathon:
To calculate the percentage of racers who did not complete the marathon, use the formula:
\[
\text{Percentage} = \left(\frac{\text{Number who did not complete}}{\text{Total racers}} \right) \times 100
\]
\[
\text{Percentage} = \left(\frac{22}{210}\right) \times 100 \approx 10.5\%
\]

Thus, **10.5%** of racers did not complete the marathon.

Would you like further details or clarification?

Here are five related questions you might explore:
1. What percentage of racers gave up?
2. What percentage of racers completed the marathon?
3. If 5 more racers had given up, what would the new percentage of non-completers be?
4. How many racers would need to complete the marathon for the percentage of non-completers to drop below 10%?
5. If another group of 50 racers joined the marathon, how would that affect the completion percentages?

**Tip:** When calculating percentages, always make sure to base your calculation on the correct total or denominator, as this can change depending on how the problem is structured.

Out of 210 racers who started the marathon, 188 completed the race, 16 gave up, and 6 were disqualified. What percentage did not complete the marathon?

Calculate the percentage of racers who did not complete the marathon out of 210 participants, with 16 giving up and 6 disqualified. Learn the step-by-step process to solve this real-world percentage problem. Suitable for Grades 5-7.

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