Percentage
- 0.001 is equivalent to
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We have , 0.1% = 0.1 = 0.001 100 Correct Option: D
We have , 0.1% = 0.1 = 0.001 100
Hence , required answer is 0.1% .
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If 40% of (A + B) = 60% of (A – B) then 2A – 3B is A + B
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Here , 40% of (A + B) = 60% of (A – B)
⇒ (A + B) × 40 = (A - B) × 60 100 100
⇒ 2 (A + B) = 3 (A – B)
⇒ 2A + 2B = 3A – 3B
⇒ A = 5B∴ 2A - 3B = 10B - 3B A + B 5B + B
Correct Option: A
Here , 40% of (A + B) = 60% of (A – B)
⇒ (A + B) × 40 = (A - B) × 60 100 100
⇒ 2 (A + B) = 3 (A – B)
⇒ 2A + 2B = 3A – 3B
⇒ A = 5B∴ 2A - 3B = 10B - 3B A + B 5B + B Required answer = 7B = 7 6B 6
- If 30% of A is added to 40% of B, the answer is 80% of B. What percentage of A is B?
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According to question ,
A × 30 + B × 40 = B × 80 100 100 100
⇒ A × 30 = B × 40⇒ A = 40 = 4 B 30 3 ⇒ B = 3 A 4
Correct Option: D
According to question ,
A × 30 + B × 40 = B × 80 100 100 100
⇒ A × 30 = B × 40⇒ A = 40 = 4 B 30 3 ⇒ B = 3 A 4 ⇒ Required answer = B × 100 = 3 × 100 = 75% A 4
- If 90% of A = 30% of B and B = 2y% of A, then the value of y is
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Given that , 90% of A = 30% of B and B = 2y% of A
⇒ A × 90 = B × 30 100 100
⇒ 3A = B
Correct Option: D
Given that , 90% of A = 30% of B and B = 2y% of A
⇒ A × 90 = B × 30 100 100
⇒ 3A = B⇒ 3A = A × 2y 100
⇒ 300 = 2y ⇒ y = 150
- If 90% of A = 30% of B and B = y% of A, then the value of y is
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View Hint View Answer Discuss in Forum
Given that , 90% of A = 30% of B
A × 90 = B × 30 100 100
⇒ A × 3 = B
⇒ A × y% = A × 3
Correct Option: B
Given that , 90% of A = 30% of B
A × 90 = B × 30 100 100
⇒ A × 3 = B
⇒ A × y% = A × 3⇒ y = 3 ⇒ y = 300 100
