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:
72 comments Page 2 of 8.
Bittu Rana said:
8 months ago
B = 20% of A.
Then B% of 20 = (20% of A)% of 20,
= 20/100 of A/100 of 20,
= (20/100)*(A/100)*20
= (4/100)*A = 4% of A.
Then B% of 20 = (20% of A)% of 20,
= 20/100 of A/100 of 20,
= (20/100)*(A/100)*20
= (4/100)*A = 4% of A.
(13)
Varun said:
5 years ago
A = 100,
B = 20.
20% of B = 2 * 2 = 4.
B = 20.
20% of B = 2 * 2 = 4.
(6)
JIYA said:
3 years ago
Hi,
20/100a * 1/100 * 20 ,
400a/10,000,
4/100a%.
Now,
4/100 *100 = 4%.
20/100a * 1/100 * 20 ,
400a/10,000,
4/100a%.
Now,
4/100 *100 = 4%.
(6)
Samrat said:
10 months ago
But here we considered a as 100, but if we consider a as 10, the answer will be different, which is 20% of a; then it should not be considered as universal.
(5)
Tenzin Tshedup said:
5 years ago
Let's say a = 100.
0.2 * 100 = 20 which is B,
So,
0.2 * 20 = 4 which is equal to 0.04 * 100= 4.
0.2 * 100 = 20 which is B,
So,
0.2 * 20 = 4 which is equal to 0.04 * 100= 4.
(5)
SANKAR NAYAK said:
5 years ago
If 20% of a=b means B =(20/100)*a ----> eq(1)
And b%of 20 means (b/100)*20 ----> eq(2).
If we put eq(1) value in eq(2) Then,
[{(20/100)*a}/100]*100
If we simply fy it = {100/(100*20*a)}*20,
=> 1/(20*a)*20.
=> 1/a So ans is incorrect.
If we modify qn and put 20% of b then
(20/100)*b.
We put b value i.e b = (20/100)*a,
Then => (20/100)*(20/100)*a,
If we simply fy it , then,
(20*20/100*100)*a.
And answer will be (4/100)*a.
Means 4% of a.
And b%of 20 means (b/100)*20 ----> eq(2).
If we put eq(1) value in eq(2) Then,
[{(20/100)*a}/100]*100
If we simply fy it = {100/(100*20*a)}*20,
=> 1/(20*a)*20.
=> 1/a So ans is incorrect.
If we modify qn and put 20% of b then
(20/100)*b.
We put b value i.e b = (20/100)*a,
Then => (20/100)*(20/100)*a,
If we simply fy it , then,
(20*20/100*100)*a.
And answer will be (4/100)*a.
Means 4% of a.
(4)
Subhashini R said:
1 month ago
20%of a = b
(20/100)a = b
(1/5)a = b
b = a/5.
Then b% of 20 = ?
b/100 = 20.
subs b = a/5.
(a/5)/100 = 20.
a/500 = 20.
a/25 = 0.004 x a.
It means 4% of a.
(20/100)a = b
(1/5)a = b
b = a/5.
Then b% of 20 = ?
b/100 = 20.
subs b = a/5.
(a/5)/100 = 20.
a/500 = 20.
a/25 = 0.004 x a.
It means 4% of a.
(4)
Ritesh said:
3 years ago
(5/3)X - P% of (5/3)X = (3/5)X.
After solving this equation for the value of P, we will be getting the percentage error.
After solving this equation for the value of P, we will be getting the percentage error.
(4)
ADITYA KSHETRASIMHA said:
6 months ago
Really good, thanks all.
(4)
Prasad M said:
7 years ago
As percent always calculates at 100 ref. Let a= 100.
20% of a means - 20 which is b acc to question.
20 percent of again 20 (got above) is 4 percent of a.
This doesn't require any paper calculations I believe, Hope it helps.
20% of a means - 20 which is b acc to question.
20 percent of again 20 (got above) is 4 percent of a.
This doesn't require any paper calculations I believe, Hope it helps.
(3)
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