Aptitude - Percentage - Discussion

Discussion Forum : Percentage - General Questions (Q.No. 6)
6.
If 20% of a = b, then b% of 20 is the same as:
4% of a
5% of a
20% of a
None of these
Answer: Option
Explanation:

20% of a = b      20 a = b.
100

b% of 20 = b x 20 = 20 a x 1 x 20 = 4 a = 4% of a.
100 100 100 100

Discussion:
68 comments Page 7 of 7.

Dieva said:   8 years ago
Agree @Sid.

Why was b replaced with 1?

Swapnil said:   8 years ago
(20% of a)/100 = (20% of a) * (1/100).

Halvaraj said:   7 years ago
(20% of a)/100 = (20% of a) * (1/100).

Rahulj said:   9 years ago
Nice explanation @Arun.

Narmadha said:   7 years ago
If you consider a=50, then the answer will not be 4%, there is no clue in the question that one should take a=100. When I assigned a=100 I got the answer as 4%, then when I assigned different value for a, the % varies.

Ubaid goje said:   7 years ago
Thanks @Swaminathan Vembu.

Sagar said:   7 years ago
Hi, I am not understanding this. Anyone explain me to get the answer.

Qadir said:   6 years ago
20% of a = b --> Assume a as 100.

So, 20% of 100 = 20 By this we can say b=20.

Now, b% of 20 b=20% of 20=4 which is the answer.


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