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If x/y = 2, then (x-y)/y =

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If x/y = 2, then (x-y)/y =  [#permalink]

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New post 15 Dec 2018, 07:40
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

93% (00:17) correct 7% (00:07) wrong based on 42 sessions

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If \(\frac{x}{y} = 2\), then \(\frac{(x-y)}{y}\) =


(A) \(-1\)

(B) \(-\frac{1}{2}\)

(C) \(\frac{1}{2}\)

(D) \(1\)

(E) \(2\)


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Re: If x/y = 2, then (x-y)/y =  [#permalink]

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New post 15 Dec 2018, 07:52
[quote="HKD1710"]if \(\frac{x}{y} = 2\), then \(\frac{(x-y)}{y}\) =

(A) \(-1\)
(B) \(-\frac{1}{2}\)
(C) \(\frac{1}{2}\)
(D) \(1\)
(E) \(2\)


X/Y = 2,
X - Y /Y = X/ Y - 1

2- 1 = 1

Choice D
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Re: If x/y = 2, then (x-y)/y =  [#permalink]

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New post 15 Dec 2018, 08:02
Top Contributor
HKD1710 wrote:
if \(\frac{x}{y} = 2\), then \(\frac{(x-y)}{y}\) =

(A) \(-1\)
(B) \(-\frac{1}{2}\)
(C) \(\frac{1}{2}\)
(D) \(1\)
(E) \(2\)

Project PS Butler : Question #80


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APPROACH #1: Use the fact that (a - b)/c = a/b - b/c
So, (x - y)/y = x/y - y/y
= x/y - 1
= 2 - 1
= 1
Answer: D

APPROACH #2: Plug in values.
If x/y = 2, then it could be the case that x = 6 and y = 3
So, (x - y)/y = (6 - 3)/3
= 3/3
= 1
Answer: D

Cheers,
Brent
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Re: If x/y = 2, then (x-y)/y =  [#permalink]

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New post 15 Dec 2018, 08:27
x/y = 2.... eqn 1

(x - y)/y = z ... eqn 2

From 1.
x = 2y .... eqn 3


Putting 2 into 3

(2y - y)/y = y/y = z

Therefore, z = 1 (D)

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Re: If x/y = 2, then (x-y)/y =  [#permalink]

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New post 16 Dec 2018, 15:50
1
GMATPrepNow Also got D but OA is C, any insight?


GMATPrepNow wrote:
HKD1710 wrote:
if \(\frac{x}{y} = 2\), then \(\frac{(x-y)}{y}\) =

(A) \(-1\)
(B) \(-\frac{1}{2}\)
(C) \(\frac{1}{2}\)
(D) \(1\)
(E) \(2\)

Project PS Butler : Question #80


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APPROACH #1: Use the fact that (a - b)/c = a/b - b/c
So, (x - y)/y = x/y - y/y
= x/y - 1
= 2 - 1
= 1
Answer: D

APPROACH #2: Plug in values.
If x/y = 2, then it could be the case that x = 6 and y = 3
So, (x - y)/y = (6 - 3)/3
= 3/3
= 1
Answer: D

Cheers,
Brent
CEO
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Joined: 11 Sep 2015
Posts: 3331
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Re: If x/y = 2, then (x-y)/y =  [#permalink]

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New post 16 Dec 2018, 18:16
1
Top Contributor
funsogu wrote:
GMATPrepNow Also got D but OA is C, any insight?


GMATPrepNow wrote:
HKD1710 wrote:
if \(\frac{x}{y} = 2\), then \(\frac{(x-y)}{y}\) =

(A) \(-1\)
(B) \(-\frac{1}{2}\)
(C) \(\frac{1}{2}\)
(D) \(1\)
(E) \(2\)

Project PS Butler : Question #80


Subscribe to get Daily Email - Click Here | Subscribe via RSS - RSS


APPROACH #1: Use the fact that (a - b)/c = a/b - b/c
So, (x - y)/y = x/y - y/y
= x/y - 1
= 2 - 1
= 1
Answer: D

APPROACH #2: Plug in values.
If x/y = 2, then it could be the case that x = 6 and y = 3
So, (x - y)/y = (6 - 3)/3
= 3/3
= 1
Answer: D

Cheers,
Brent


I think the OP may have entered the wrong answer.

Cheers,
Brent
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If x/y = 2, then (x-y)/y =  [#permalink]

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New post 16 Dec 2018, 19:34
1
GMATPrepNow wrote:
funsogu wrote:
GMATPrepNow Also got D but OA is C, any insight?

I think the OP may have entered the wrong answer.

Cheers,
Brent

funsogu , GMATPrepNow (Brent)

Edited. Thanks.
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If x/y = 2, then (x-y)/y = &nbs [#permalink] 16 Dec 2018, 19:34
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