A supermarket offers a 'buy 3 get 1 free' promotion for canned cola. If amy buys 4 cans of cola at the supermarket, what is the percentage discount?

To determine the percentage discount Amy receives from the "buy 3 get 1 free" promotion, let's break down the calculation:

1. **Normal Cost**: 
   - If Amy were to buy 4 cans without any promotion, she would pay for all 4 cans.

2. **Promotion Applied**:
   - With the promotion, Amy buys 3 cans and gets the 4th can for free. Therefore, she only pays for 3 cans instead of 4.

3. **Discount Calculation**:
   - The discount is the cost of 1 can since she gets 1 can free out of the 4.

4. **Percentage Discount**:
   \[
   \text{Percentage Discount} = \left(\frac{\text{Cost of 1 can}}{\text{Cost of 4 cans}}\right) \times 100\%
   \]
   Since the cost of 1 can is \( \frac{1}{4} \) of the total cost of 4 cans:
   \[
   \text{Percentage Discount} = \left(\frac{1}{4}\right) \times 100\% = 25\%
   \]

Therefore, Amy receives a **25% discount** on her purchase.

Would you like any details on the calculation or have any further questions?

Here are 5 related questions to explore:

1. What would be the percentage discount if the promotion was "buy 2 get 1 free"?
2. How much would Amy save if she bought 8 cans of cola under the same promotion?
3. What is the effective price per can of cola after applying the "buy 3 get 1 free" promotion?
4. How would the discount change if the price of each can increased by 10%?
5. What would be the discount if Amy bought 6 cans and applied the "buy 3 get 1 free" promotion twice?

**Tip:** When analyzing discounts, always consider the total quantity you are paying for versus what you are receiving to calculate the effective discount percentage.

A supermarket offers a 'buy 3 get 1 free' promotion for canned cola. If Amy buys 4 cans of cola at the supermarket, what is the percentage discount?

Learn how to calculate the percentage discount Amy receives on her purchase with a 'buy 3 get 1 free' promotion. This problem involves understanding ratios, percentages, and basic discount calculations, suitable for students in Grades 5-7.

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