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The image contains a bar chart comparing the total sales of six stores between the years 2013 and 2014. The question asks for the percentage increase in sales for the stores that had higher sales in 2014 compared to the average of all store sales in 2013.

To solve this, let's break down the process:

1. **Extract data from the graph:**
   - The chart shows the sales in 2013 and 2014 for each of the six stores.
   - We need to calculate the average sales for all stores in 2013.
   - Identify which stores had sales higher in 2014 than in 2013.
   
2. **Calculate the average of all sales in 2013:**
   - Store 1 (أ): 85
   - Store 2 (ب): 75
   - Store 3 (ج): 95
   - Store 4 (د): 90
   - Store 5 (هـ): 115
   - Store 6 (و): 85
   - Average for 2013: \[(85 + 75 + 95 + 90 + 115 + 85) / 6 = 90.83\]

3. **Identify stores with higher sales in 2014:**
   - Store 1: 105 (Higher than 85 in 2013)
   - Store 4: 100 (Higher than 90 in 2013)
   - Store 5: 125 (Higher than 115 in 2013)
   - Store 6: 95 (Higher than 85 in 2013)

4. **Percentage increase formula:**
   The percentage increase for stores with higher sales in 2014 compared to the average sales in 2013:
   \[
   \frac{(\text{2014 sales for selected stores}) - \text{average 2013 sales}}{\text{average 2013 sales}} \times 100
   \]

Let's calculate it for each store with higher sales in 2014:
   - Store 1: \(\frac{105 - 90.83}{90.83} \times 100 \approx 15.61\%\)
   - Store 4: \(\frac{100 - 90.83}{90.83} \times 100 \approx 10.1\%\)
   - Store 5: \(\frac{125 - 90.83}{90.83} \times 100 \approx 37.6\%\)
   - Store 6: \(\frac{95 - 90.83}{90.83} \times 100 \approx 4.6\%\)

Summing these increases:
   - 15.61% + 10.1% + 37.6% + 4.6% = 67.91%

The closest answer choice is **16.7%**, but it seems the actual calculated sum doesn't match exactly. Would you like to clarify any specific part of the graph or the question?

Here are 5 related questions to deepen your understanding:
1. How do you calculate percentage increase when comparing data from two different years?
2. Why is averaging necessary when comparing sales across multiple stores?
3. How would the result change if only one store had higher sales in 2014?
4. What is the importance of looking at averages in sales performance?
5. How do outliers affect the average sales calculation?

**Tip:** Always double-check the exact requirements of a percentage increase question, as it might ask for individual or combined percentages.

ما هي النسبة المئوية للمتاجر الستة التي حققت مبيعات أعلى عام 2014 مقارنة مع متوسط مبيعات جميع المتاجر عام 2013؟

Learn how to calculate the percentage increase in sales for six stores from 2013 to 2014. Understand the process of comparing sales data and calculating averages to determine the percentage change.

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