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What was the percent change in a certain stock portfolio's value betwe

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What was the percent change in a certain stock portfolio's value betwe [#permalink]

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New post 18 Apr 2017, 04:55
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Question Stats:

63% (01:17) correct 37% (01:12) wrong based on 86 sessions

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What was the percent change in a certain stock portfolio's value between July 1 and August 1?

(1) The portfolio's value decreased by 20% between August 1 and September 1, at which point the portfolio's value was 25% greater than it had been on July 1.

(2) The portfolio's value decreased by 20% between June 1 and July 1, at which point the portfolio's value was 20% less than it would be on September 1.

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Re: What was the percent change in a certain stock portfolio's value betwe [#permalink]

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New post 18 Apr 2017, 09:03
What was the percent change in a certain stock portfolio's value between July 1 and August 1?

(1) The portfolio's value decreased by 20% between August 1 and September 1, at which point the portfolio's value was 25% greater than it had been on July 1.

Let Portfolio value on August 1 = $100
Portfolio value on September 1 = $80 [0.8 * 100]
Portfolio value on July 1 = $64 = [80/1.25]
Percent change in a certain stock portfolio's value between July 1 and August 1 = (100-64)*100/64

As we can see this statement is sufficient.

(2) The portfolio's value decreased by 20% between June 1 and July 1, at which point the portfolio's value was 20% less than it would be on September 1.

This statement gives no information on the value of the portfolio on August 1 and hence is insufficient.

Answer is A
Re: What was the percent change in a certain stock portfolio's value betwe   [#permalink] 18 Apr 2017, 09:03
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