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The question asks for the expression that can be used to find the sale price of a sofa that is 25% off, with an original price of $899.

### Breakdown:
- The sofa is on sale for 25% off, which means the discount is 25% of the original price.
- To find the sale price, you need to subtract 25% of the original price from the original price itself.
  
The percentage discount is 25%, or $ 0.25 $ as a decimal. Therefore, to find the amount after the discount:
- The sale price is $ 899 \times (1 - 0.25) = 899 \times 0.75 $.

So, the correct expression to find the sale price is:
- **D. $(899) \times (0.75)$**

Would you like further details on this solution? 

Here are five related questions:
1. How do you convert percentages to decimals?
2. What other mathematical methods can be used to calculate discounts?
3. What is the importance of parentheses in expressions like this?
4. How would you find the sale price if the discount was a fixed dollar amount?
5. How do you calculate the original price if the sale price and discount percentage are given?

**Tip:** Always convert percentages into decimal form before using them in calculations.

If the original price of the sofa is $899, which expression could be used to find the sale price?

Learn how to find the sale price of a sofa originally priced at $899, with a 25% discount. This problem demonstrates the use of percentages and multiplication to calculate the final price. Suitable for Grade 7 math students.

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