GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Nov 17Live Online Classes with Top GRE Expert Rich Zwelling
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Tues/Thur Sept 7, 2026---Feb. 2, 2027, 1:00pm-3:00pm EST
Dec 14Live Online Classes with Top GRE Expert Michael Butville
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Mon/Wed Dec. 14, 2026---Feb. 22, 2027, 8:00pm-10:00pm EST
The price of a certain stock rose by 25 percent and then
[#permalink]
10 Jun 2018, 05:07
10 Jun 2018, 05:07
1
Expert Reply
1
Bookmarks
00:00
Question Stats:
76% (01:13) correct
23% (00:55) wrong based on 115 sessions
Hide Show timer Statistics
The price of a certain stock rose by 25 percent and then decreased by y percent. After the decrease, the stock was back to its original price.
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
y |
25 |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Re: The price of a certain stock rose by 25 percent and then
[#permalink]
11 Jul 2018, 16:01
11 Jul 2018, 16:01
2
Expert Reply
Explanation
Use a smart number for the price of the stock; for a percent problem, $100 is a good choice.
The price of the stock after a 25% increase is (1.25) × $100 = $125.
Next, find the percent decrease (y) needed to reduce the price back to the original $100. Because $125 – $25 = $100, rephrase the question: 25 is what percent of 125?
\(25=\frac{x}{100}125\)
\(x=20\)
You have to reduce 125 by 20% in order to get back to $100. Therefore, Quantity A is 20%, so Quantity B is greater.
Use a smart number for the price of the stock; for a percent problem, $100 is a good choice.
The price of the stock after a 25% increase is (1.25) × $100 = $125.
Next, find the percent decrease (y) needed to reduce the price back to the original $100. Because $125 – $25 = $100, rephrase the question: 25 is what percent of 125?
\(25=\frac{x}{100}125\)
\(x=20\)
You have to reduce 125 by 20% in order to get back to $100. Therefore, Quantity A is 20%, so Quantity B is greater.
Re: The price of a certain stock rose by 25 percent and then
[#permalink]
01 May 2020, 04:09
01 May 2020, 04:09
Using 100 as my smart number, 25% increase = $125
To get back to $100, I went this way:
$125*y%=100
y%=100/125
y%=.8
$100 is 80% of $125.
The price of $125 has to decrease by 20% to get back to $100.
25 is greater than 20, answer is B.
Another way to get to the same answer, although Sandy's way avoids having to remember to subtract 80 from 100 to get the percent decrease.
To get back to $100, I went this way:
$125*y%=100
y%=100/125
y%=.8
$100 is 80% of $125.
The price of $125 has to decrease by 20% to get back to $100.
25 is greater than 20, answer is B.
Another way to get to the same answer, although Sandy's way avoids having to remember to subtract 80 from 100 to get the percent decrease.
