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One plant grew 6 inches while a second plant grew 250% more than the

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One plant grew 6 inches while a second plant grew 250% more than the  [#permalink]

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New post 20 Mar 2018, 21:40
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A
B
C
D
E

Difficulty:

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Question Stats:

79% (00:40) correct 21% (00:38) wrong based on 44 sessions

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One plant grew 6 inches while a second plant grew 250% more than the first plant grew. How much, in inches, did the second plant grow?

(A) 6
(B) 8
(C) 12
(D) 15
(E) 21

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Re: One plant grew 6 inches while a second plant grew 250% more than the  [#permalink]

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New post 20 Mar 2018, 21:42
Bunuel wrote:
One plant grew 6 inches while a second plant grew 250% more than the first plant grew. How much, in inches, did the second plant grow?

(A) 6
(B) 8
(C) 12
(D) 15
(E) 21


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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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One plant grew 6 inches while a second plant grew 250% more than the  [#permalink]

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New post 21 Mar 2018, 12:38
1
Bunuel wrote:
One plant grew 6 inches while a second plant grew 250% more than the first plant grew. How much, in inches, did the second plant grow?

(A) 6
(B) 8
(C) 12
(D) 15
(E) 21

10% more than A = (1 + .10) = 1.10A

If percent MORE is > 100, the method is the same: add the percentage in decimal form to 1

250 percent MORE than original =(1 + 2.5)=(3.5)
(original + 250% of original)
(original)*(1 + 2.50) = (original)*(3.5)

A grows 6 inches
B grows 250% more than A = 3.5A
(3.5) * 6 = 21 inches

OR
100% MORE than 6 = 12 (=twice)

200% MORE than 6 = 18 (=thrice)
50% MORE than 6 = 3 (=\(\frac{1}{2}\) of 6 more)

(250%) = (200%+50%) = (18+3) = 21

Answer E

*Percent OF means multiply:
10% of 100 = (.10) * 100 = 10
200% of 5 = (2) * 5 = 10

Percent MORE THAN and percent GREATER THAN
indicate addition after multiplication. Both mean:
add the given percent to the original number

You could find 250% of A=6 and add to original number
250% of 6?\(\frac{250}{100}=(\frac{5}{2}*6)=15\)
Add 15 to original: \((15 + 6) = 21\)

OR combine multiplication and addition
250% more than A=(100% of A+250% of A)= 350% of A
250% more than A = (1A + 2.5A) = 3.5A
(3.5) * 6 = 21

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One plant grew 6 inches while a second plant grew 250% more than the &nbs [#permalink] 21 Mar 2018, 12:38
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