Question:
By what percentage did the total book sales of the three stores increase from 2005 to 2010?
By what percentage did the total book sales of the three stores increase from 2005 to 2010?
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Always use \(\frac{\text{increase}}{\text{original}} \times 100\) for percentage change.
Updated On: Oct 3, 2025
- 12%
- 20%
- 33.3%
- 15%
- 25%
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The Correct Option is B
Solution and Explanation
Step 1: Sales in 2005.
Store A = 8, Store B = 12, Store C = 10.
Total = \(8 + 12 + 10 = 30\).
Step 2: Sales in 2010.
Store A = 11, Store B = 13, Store C = 12.
Total = \(11 + 13 + 12 = 36\).
Step 3: Increase.
Increase = \(36 - 30 = 6\).
Step 4: Percentage.
\[ \frac{6}{30} \times 100 = 20%. \] Final Answer: 20%
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