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:
70 comments Page 5 of 7.
Cosmicguypradeep said:
1 decade ago
@habiha
here is the answer
% increase = (actual increase/original price *100)%
% decrease = (actual decrease/ original price *100)%
so, for this question we have to calculate % increase (since the pen was sold at higher rate 45, which was actually bought for 15 Rs)
(60-15/15 *100)% = 300%.
here is the answer
% increase = (actual increase/original price *100)%
% decrease = (actual decrease/ original price *100)%
so, for this question we have to calculate % increase (since the pen was sold at higher rate 45, which was actually bought for 15 Rs)
(60-15/15 *100)% = 300%.
Mahesh said:
1 decade ago
In earlier sum, how
=(20/100)a * (1/100) * 20 comes,
because if we sub b=(20/100)a in I then that equ'n comes like
((20/100)a)/100*20 then how it comes (20/100)a * (1/100) * 20
=(20/100)a * (1/100) * 20 comes,
because if we sub b=(20/100)a in I then that equ'n comes like
((20/100)a)/100*20 then how it comes (20/100)a * (1/100) * 20
Kcs said:
1 decade ago
Take a=100
b=20%a=20%100=20/100*100=20
b=20
20%b=20/100*20=4
4%a=4%100=4
5%a=5%100=5
20%a=20%100=20
ans=4%.
b=20%a=20%100=20/100*100=20
b=20
20%b=20/100*20=4
4%a=4%100=4
5%a=5%100=5
20%a=20%100=20
ans=4%.
Bharathi Prasath S said:
1 decade ago
((20/100*a=b) => a=5b).
b/100*20=> b/5-->(1) 4% of a = 4/100*5b = b/5---> (2).
(1) = (2).
So option A.
b/100*20=> b/5-->(1) 4% of a = 4/100*5b = b/5---> (2).
(1) = (2).
So option A.
Rajeev said:
1 decade ago
Actually I am unable to understand the explanation you have given. I think you are skipping some steps. Can anyone help me by giving proper answer with step by step.
Anuj said:
1 decade ago
Let assume a =100,then 20% of a=b.
=20/100*100=> 20.
That means b=20.
Then b% of 20.
b/100*20.
It can also be written as (if we put the value of b).
20/100*20 =>4.
=20/100*100=> 20.
That means b=20.
Then b% of 20.
b/100*20.
It can also be written as (if we put the value of b).
20/100*20 =>4.
Alekya reddy said:
1 decade ago
If we take a = 20.
20%20 = 4.
Therefore b = 4.
Now 4%20 = 0.5.
20%a = b then b%20 is not equal to.
Can you please clarify?
20%20 = 4.
Therefore b = 4.
Now 4%20 = 0.5.
20%a = b then b%20 is not equal to.
Can you please clarify?
Swaminathan Vembu said:
1 decade ago
The Question -> f 20% of a = b, then b% of 20 is the same as ?
Now since 20/100 * a = b,
b = 1/5*a = 0.2a.
b% of 20 implies 0.2a / 100 * 20 = 0.04a = 4% of a [4/100 * a].
Now since 20/100 * a = b,
b = 1/5*a = 0.2a.
b% of 20 implies 0.2a / 100 * 20 = 0.04a = 4% of a [4/100 * a].
Agila said:
1 decade ago
Please explain why a=20/100*a and b=b/100*20 why this different?
Sunil said:
1 decade ago
@Habiba simple step :
60-15 : 45.
At present he bought it at 15 So,
It is (45/15)*100: 300.
60-15 : 45.
At present he bought it at 15 So,
It is (45/15)*100: 300.
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