Given line graph shows the data of male & female population in 5 different cities.
Read the data carefully and answer the questions.
![Screenshot 2025-09-16 151828.png](https://res.cloudinary.com/aptidude/image/upload/v1758016147/aptidude_questions/e7trva8n9p5wueejmowo.png) By what percent is the total population of city A less than that of city D?

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**Solution:**

1. Calculate the total population of city A:
   - Male population = 300
   - Female population = 400
   - Total population of city A = 300 + 400 = 700

2. Calculate the total population of city D:
   - Male population = 450
   - Female population = 550
   - Total population of city D = 450 + 550 = 1000

3. Find the percentage by which city A's population is less than city D's population:
   $$	ext{Percentage decrease} = \frac{1000 - 700}{1000} 	imes 100 = \frac{300}{1000} 	imes 100 = 30\%$$

**Answer:** 30\%

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