Percentage relation between two numbers: 48% of the first number equals 60% of the second number. Determine the ratio of the first number to the second number, keeping percentages and comparative meaning exactly as stated.
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A4 : 7
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B3 : 4
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C5 : 4
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DCould not be determined
Answer
Correct Answer: 5 : 4
Explanation
Introduction / Context:This problem tests translation of percentage statements into algebra and then simplifying to a ratio. When one percentage of a quantity equals another percentage of a different quantity, setting up an equation and simplifying is the most reliable method.Given Data / Assumptions:
- Let the first number be A.
- Let the second number be B.
- Statement: 48% of A equals 60% of B.
- We assume A and B are positive real numbers (typical in ratio questions).
Concept / Approach:Convert each percentage to a decimal multiplier. Then form an equation 0.48A = 0.60B and isolate A/B (or B/A). Ratios are scale-free, so any common factors can be canceled cleanly without needing actual values of A or B.Step-by-Step Solution:
0.48A = 0.60BA/B = 0.60/0.48A/B = 60/48 = 5/4Therefore, the ratio first : second = 5 : 4.Verification / Alternative check:Pick B = 4 ⇒ A = 5. Check 48% of 5 = 2.4, 60% of 4 = 2.4, which match exactly. Hence the ratio is correct.
Why Other Options Are Wrong:
- 4 : 7 and 3 : 4: Do not satisfy 0.48A = 0.60B upon substitution.
- Could not be determined: The equation uniquely determines the ratio; no ambiguity exists.
Common Pitfalls:Swapping the percentages or inverting the ratio. A common error is writing 48/60 instead of 60/48 for A/B. Always solve the equation carefully.
Final Answer:
5 : 4