Percentage
- If x% of a is the same as y% of b, then z% of b will be
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Given , x% of a = y% of b
⇒ ax = by 100 100 ⇒ b = ax y ∴ z% of b = ax × z y 100
Correct Option: B
Given , x% of a = y% of b
⇒ ax = by 100 100 ⇒ b = ax y ∴ z% of b = ax × z y 100 Required answer = xz % of a y
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If 20% of (A + B) = 50% of B, then value of A - B is A + B
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(A + B) × 20 = B × 50 100 100 ⇒ A + B = B 5 2
⇒ 2A + 2B = 5B
⇒ 2A = 3B⇒ 2A = 3 ⇒ 2A = 3B B ∴ = 2 A - 1 2A - B B 2A + B 2 A + 1 B Required answer = 3 - 1 3 + 1
Correct Option: A
(A + B) × 20 = B × 50 100 100 ⇒ A + B = B 5 2
⇒ 2A + 2B = 5B
⇒ 2A = 3B⇒ 2A = 3 ⇒ 2A = 3B B ∴ = 2 A - 1 2A - B B 2A + B 2 A + 1 B Required answer = 3 - 1 3 + 1 Required answer = 2 = 1 4 2 Or 3B - B = 2B 3B + B 4B
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If 120% of a is equal to 80% of b, then b + a is equal to b - a
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As per the given question ,
a × 120 = b × 80 100 100 ⇒ b = 120 = 3 b 80 2 ∴ = b + 1 b + a a b - a b - 1 a Required answer = 3 + 1 2 3 - 1 2
Correct Option: A
As per the given question ,
a × 120 = b × 80 100 100 ⇒ b = 120 = 3 b 80 2 ∴ = b + 1 b + a a b - a b - 1 a Required answer = 3 + 1 2 3 - 1 2 Required answer = 5 = 5 2 1 2
- One-third of 1206 is what percent of 134 ?
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Here , 1 of 1206 3 = 1206 × 1 = 402 3
Correct Option: D
Here , 1 of 1206 3 = 1206 × 1 = 402 3 ∴ Required percent = 402 × 100 = 300% 134
- What percent of 3.5 kg is 70 gms ?
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According to question ,
Required percentage = 70 × 100 3.5 × 1000 Correct Option: D
According to question ,
Required percentage = 70 × 100 = 2% 3.5 × 1000
