a stereo system is marked down from \$425 to \$318.75. what is the discount rate?

a 15%
b 20%
c 25%
d 30%

Question

a stereo system is marked down from \$425 to \$318.75. what is the discount rate?

a 15%
b 20%
c 25%
d 30%

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Percent Decrease" ], "new_concepts": [], "current_concepts": [ "Percent Decrease", "Percentage Calculation" ] } ## Calculate the discount amount Using the *Percent Decrease* knowledge point $$ \text{Discount Amount} = \$425 - \$318.75 = \$106.25 $$ ## Calculate the discount rate Using the *Percent Decrease* knowledge point $$ \text{Discount Rate} = \frac{\$106.25}{\$425} = 0.25 = 25\% $$

(A) 15%

(B) 20%

(C) 25%

(D) 30%

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Algebra", "Percent Decrease" ] }

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Explanation:

Calculate the discount amount

Calculate the discount rate

Answer: