a shop sells butter normally at $3.50. it offers a 15% discount. what is the sale price

To find the sale price of the butter after applying a 15% discount, we can use the formula for calculating the discounted price:

\[
\text{Sale Price} = \text{Original Price} \times (1 - \text{Discount Rate})
\]

### Given Values:
- **Original Price** = $3.50
- **Discount Rate** = 15% = 0.15

### Step-by-Step Calculation:

1. **Calculate the discount amount**:
   \[
   \text{Discount Amount} = \text{Original Price} \times \text{Discount Rate} = 3.50 \times 0.15 = 0.525
   \]

2. **Subtract the discount amount from the original price**:
   \[
   \text{Sale Price} = \text{Original Price} - \text{Discount Amount} = 3.50 - 0.525 = 2.975
   \]

Thus, the sale price of the butter after applying the 15% discount is **$2.98** (rounded to two decimal places).

### Conclusion:
The sale price of the butter after the 15% discount is **$2.98**.

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Would you like further details on this calculation, or do you have any other questions?

### Related Questions:
1. What would the sale price be if the discount was 20%?
2. If the shop increases the original price to $4.00, what would the new sale price be with a 15% discount?
3. How much would you save if you bought 5 packs of butter at the sale price?
4. What percentage discount would result in a sale price of exactly $3.00?
5. How do you calculate the original price if you know the sale price and the discount percentage?

### Tip:
When calculating discounts, always convert the percentage to a decimal by dividing by 100 before multiplying by the original price.

Learn how to calculate the sale price after applying a 15% discount on butter originally priced at $3.50. This problem covers basic percentage calculations and discount formulas. Suitable for students in Grades 5-6.

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