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What was the percentage increase of Mr...

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by AAPL » Sat Nov 18, 2017 3:13 pm
What was the percentage increase of Mr. Doolittle's rent?

1) His rent was raised $45.
2) He now pays $315 per month.

The OA is C.

Please, can any expert assist me with this PS question? I don't have it clear and I appreciate if any explain it for me. Thanks.
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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Mon Dec 11, 2017 10:42 pm
AAPL wrote:What was the percentage increase of Mr. Doolittle's rent?

1) His rent was raised $45.
2) He now pays $315 per month.

The OA is C.

Please, can any expert assist me with this PS question? I don't have it clear and I appreciate if any explain it for me. Thanks.
The percentage increase of the rent = [(Rent now - Rent before) / Rent before]*100%

1) His rent was raised $45.

We only know that Rent now - Rent before = $45. There is no inforamtion about Rent before. Insufficient.

2) He now pays $315 per month.

We only know that Rent now = $45. There is no inforamtion about Rent before. Insufficient.

(1) and (2) together

The percentage increase of the rent = (Rent now - Rent before) / Rent before = [45 / (315 - 45)]*100% = [45 / 270]*100% = 16.67%. Sufficient

The correct answer: C

Hope this helps!

-Jay
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