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 2 of 7.
Ritesh said:
2 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)
Bibhu prasad rout said:
4 years ago
Let a=100.
20% of a=20,
then b=20,
as per the question b% of 20 is?
So 20% of 20 is 4.
20% of a=20,
then b=20,
as per the question b% of 20 is?
So 20% of 20 is 4.
(61)
Sathish said:
4 years ago
Let's 20% is 1/5.
1/5 * 20 = 4.
1/5 * 20 = 4.
(29)
Tenzin Tshedup said:
4 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)
Varun said:
4 years ago
A = 100,
B = 20.
20% of B = 2 * 2 = 4.
B = 20.
20% of B = 2 * 2 = 4.
(6)
SANKAR NAYAK said:
4 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)
Sriramamurthi said:
5 years ago
@All.
20% of a = b so in question they are given the b value.
Then b% of 20 do now,
Instead of b %, put the value of b,
20/100 of a*20 then cancel it properly. You will get the value of 4% of a.
That will be our required answer.
20% of a = b so in question they are given the b value.
Then b% of 20 do now,
Instead of b %, put the value of b,
20/100 of a*20 then cancel it properly. You will get the value of 4% of a.
That will be our required answer.
(2)
Prasad M said:
6 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)
SABARI said:
6 years ago
20% a = b
when b is 20.
a = (20/100)*20,
a = 4.
when b is 20.
a = (20/100)*20,
a = 4.
(1)
Pavan said:
6 years ago
Anyone explain this.
(1)
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