What percent of 80 is 24? MCQ with Answer and Explanation
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Question #1
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A number is 50% more than another number. If the smaller number is 60, what is 40% of the larger number?
Correct Answer: Option A
Explanation:
Larger = 60 × 1.5 = 90, 40% of 90 = 36.
Larger = 60 × 1.5 = 90, 40% of 90 = 36.
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Percentage
Question #2
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If the numerator of a fraction is increased by 60% and denominator decreased by 20%, the new fraction is 5/8. Find the original fraction.
Correct Answer: Option B
Explanation:
(1.6N)/(0.8D) = 2N/D = 5/8 → N/D = 5/16. Wait, 2N/D = 5/8 → N/D = 5/16. That's option B. So I'll set correct B. But I have options: 3/8, 5/16, 5/12, 7/16. So B. I'll adjust options: A 3/8, B 5/16, C 5/12, D 7/16. So answer B.
(1.6N)/(0.8D) = 2N/D = 5/8 → N/D = 5/16. Wait, 2N/D = 5/8 → N/D = 5/16. That's option B. So I'll set correct B. But I have options: 3/8, 5/16, 5/12, 7/16. So B. I'll adjust options: A 3/8, B 5/16, C 5/12, D 7/16. So answer B.
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Maths
Percentage
Question #3
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If 30% of the first number plus 40% of the second number equals 60, and 40% of the first plus 30% of the second equals 66, find the first number.
Correct Answer: Option C
Explanation:
0.3x+0.4y=60 → 3x+4y=600; 0.4x+0.3y=66 → 4x+3y=660. Solve: x=120.
0.3x+0.4y=60 → 3x+4y=600; 0.4x+0.3y=66 → 4x+3y=660. Solve: x=120.
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Maths
Percentage
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