https://r2.erweima.ai/mathbot/image/1726085193910xw3yt6cr.jpg

The problem states:

Out of 240 passengers on a plane heading to Mexico:
- 30% are Salvadoran,
- 25% are Honduran,
- 10% are Nicaraguan,
- The rest have an unknown nationality.

We need to calculate how many people have an unknown nationality.

### Step-by-step solution:

1. **Salvadoran passengers**:
   \( 30\% \) of 240 is:
   \[
   0.30 \times 240 = 72 \, \text{Salvadoran passengers}.
   \]

2. **Honduran passengers**:
   \( 25\% \) of 240 is:
   \[
   0.25 \times 240 = 60 \, \text{Honduran passengers}.
   \]

3. **Nicaraguan passengers**:
   \( 10\% \) of 240 is:
   \[
   0.10 \times 240 = 24 \, \text{Nicaraguan passengers}.
   \]

4. **Total known nationalities**:
   Adding the Salvadoran, Honduran, and Nicaraguan passengers:
   \[
   72 + 60 + 24 = 156 \, \text{total known passengers}.
   \]

5. **Passengers with unknown nationality**:
   Subtract the known passengers from the total passengers:
   \[
   240 - 156 = 84 \, \text{passengers with unknown nationality}.
   \]

### Conclusion:
There are **84 passengers** of unknown nationality.

Would you like more details or have any questions about this solution?

Here are some related questions you might find interesting:
1. How would the result change if 20% were from Costa Rica instead of Honduras?
2. What percentage of the passengers have an unknown nationality?
3. If the number of Salvadoran passengers increased by 10%, how many would there be?
4. How many more Honduran passengers would there be if they made up 30% instead of 25%?
5. If 15 more Nicaraguan passengers were added, how many would there be?

**Tip**: When working with percentages, converting them to decimals by dividing by 100 simplifies calculations!

De los 240 viajeros que ocupan un avión con destino a México, 30% son salvadoreños, 25% hondureños, 10% nicaragüenses y el resto son de nacionalidad desconocida. ¿Cuántas personas de nacionalidad desconocida van en el avión?

Learn how to calculate the number of passengers with unknown nationality on a flight to Mexico with a detailed step-by-step solution. The problem involves calculating percentages for Salvadoran, Honduran, and Nicaraguan passengers and determining the remainder. Suitable for Grades 5-7.

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