What percent of 3x is 6y if x = 4y?

Question

(A) 50%
(B) 40%
(C) 30%
(D) 20%
(E) 18%

Kritesh · Answer

a/100 *3x = 6y

x = 4y therefore a/100*12y = 6y

a/100 = 6/12 -----> 50%

Hence the answer is option A

irishiraj87 · Answer

Given x = 4y
Multiply 3 on both sides to get 
3x = 12y
Now looking at this we can easily say that if 12y is 100% (100/100) of 3x
Therefore 6y will be 50% 
Option A

Sent from my Redmi Note 3 using  GMAT Club Forum mobile app

sashiim20 · Answer

Let the unknown number be Z. Z % of 3x is 6y => \frac{Z}{100} * 3x = 6y Z = \frac{6y *100}{3x} Given; x = 4y Z = \frac{6y*100}{3*4y} = 50% Answer A... _________________ Kindly press "+1 Kudos" to appreciate

amanvermagmat · Answer

Required percentage will be 6y/3x * 100 = 200y/x
We just need the ratio y/x to solve this

Given x=4y or y/x = 1/4

So required percentage = 200 * 1/4 = 50%
Hence  A

JeffTargetTestPrep · Answer

We are given that x = 4y and need to determine 6y as a percent of 3x.
 
Thus:
 
6y/3x * 100 = ?
 
2y/x * 100 = ?
 
Since x = 4y, we can substitute 4y for x in our expression and we have:
 
2y/4y * 100 = 1/2 * 100 = 50%
 
Answer: A

What percent of 3x is 6y if x = 4y?

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Problem Solving (PS) Questions

What percent of 3x is 6y if x = 4y?

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards