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:
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 3 of 7.
Prajwal said:
6 years ago
(20/100)a=b ----> (1)
(b/100)*20=? --------> (2)
So substitute (1) in (2).
So we get [(20/100)/100]*20 ==>(4/100) ==>4% [because b=(20/100)a].
(b/100)*20=? --------> (2)
So substitute (1) in (2).
So we get [(20/100)/100]*20 ==>(4/100) ==>4% [because b=(20/100)a].
(1)
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.
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.
Sagar said:
7 years ago
Hi, I am not understanding this. Anyone explain me to get the answer.
Ubaid goje said:
7 years ago
Thanks @Swaminathan Vembu.
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.
Sakshi said:
7 years ago
20*20/100 = 400/ 100.
= 4% is the answer.
= 4% is the answer.
(1)
Halvaraj said:
7 years ago
(20% of a)/100 = (20% of a) * (1/100).
Swapnil said:
8 years ago
(20% of a)/100 = (20% of a) * (1/100).
Dieva said:
8 years ago
Agree @Sid.
Why was b replaced with 1?
Why was b replaced with 1?
Sudarshan prasad said:
8 years ago
Putting the value of b in b of 20% = 20% of a of 20% = 4/100 x a= 4% of a.
(1)
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