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# If 80 percent of the number a is 80, then how much is 20 percent of th

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Math Expert
Joined: 02 Sep 2009
Posts: 58428
If 80 percent of the number a is 80, then how much is 20 percent of th  [#permalink]

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10 Apr 2019, 23:29
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Difficulty:

5% (low)

Question Stats:

100% (00:20) correct 0% (00:00) wrong based on 23 sessions

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If 80 percent of the number a is 80, then how much is 20 percent of the number a ?

(A) 20
(B) 40
(C) 50
(D) 60
(E) 80

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Re: If 80 percent of the number a is 80, then how much is 20 percent of th  [#permalink]

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11 Apr 2019, 01:24
Bunuel wrote:
If 80 percent of the number a is 80, then how much is 20 percent of the number a ?

(A) 20
(B) 40
(C) 50
(D) 60
(E) 80

80*a/100 = 80
a= 100
20% of a ; 20
IMO A
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Re: If 80 percent of the number a is 80, then how much is 20 percent of th  [#permalink]

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11 Apr 2019, 01:50
0.8a= 80
a= 100
20% of 100 = 20

Ans: A. 20

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Re: If 80 percent of the number a is 80, then how much is 20 percent of th  [#permalink]

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14 Apr 2019, 18:47
Bunuel wrote:
If 80 percent of the number a is 80, then how much is 20 percent of the number a ?

(A) 20
(B) 40
(C) 50
(D) 60
(E) 80

We can create the equation:

0.8a = 80

a = 100

20% of 100 is 20.

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Re: If 80 percent of the number a is 80, then how much is 20 percent of th   [#permalink] 14 Apr 2019, 18:47
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