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 4 of 8.
Arun . S said:
1 decade ago
Here, 20% of a=b i.e.,(20/100)a=b
then, b%20 i.e.,(b/100)*20---I
then sub b=(20/100)a in I
we get,
=(20/100)a * (1/100) * 20
=(20/100)a * (20/100)
=(400/10000)a
=(4/100)a
= 4% of a
then, b%20 i.e.,(b/100)*20---I
then sub b=(20/100)a in I
we get,
=(20/100)a * (1/100) * 20
=(20/100)a * (20/100)
=(400/10000)a
=(4/100)a
= 4% of a
(1)
Kiran mali said:
9 years ago
20% of a = b.
Means,
20/100 * a = b.
0.2a = b.
Means b = 0.2a,
Now b % of 20 = suppose x,
Means b/100*20 = x,
But b = 0.2a,
Meas 0.2a/100 * 20 = x
4a/100 = x.
Means we get that's value x = 4% of a.
Means,
20/100 * a = b.
0.2a = b.
Means b = 0.2a,
Now b % of 20 = suppose x,
Means b/100*20 = x,
But b = 0.2a,
Meas 0.2a/100 * 20 = x
4a/100 = x.
Means we get that's value x = 4% of a.
(1)
Manish said:
1 decade ago
20/100*a = b.
=> a/5 = b.
i.e. b = a/5.
No b% of 20 is b/100 *20.
= b/5.
Replacing b with a/5.
= a/25.
= 0.04 a.
= 4% of a.
=> a/5 = b.
i.e. b = a/5.
No b% of 20 is b/100 *20.
= b/5.
Replacing b with a/5.
= a/25.
= 0.04 a.
= 4% of a.
(1)
Naveen said:
1 decade ago
20 percentage of a = b.
Then 20 percentage of b = ?
b = 20 percentage of a.
20 percentage of b = 20 percentage of 20 percentage of a.
= 20/100*20/100 of a = 4 percentage of a.
Then 20 percentage of b = ?
b = 20 percentage of a.
20 percentage of b = 20 percentage of 20 percentage of a.
= 20/100*20/100 of a = 4 percentage of a.
Sanjit said:
10 years ago
What number is 60% less than 80? Please find and explain it.
Balas said:
1 decade ago
Any easy method?
Praveen said:
1 decade ago
(20/100)*a equals b.
a equals b*100/20.
a equals 5 b.
b equals a/5.
Implies b equals 20 percentage of a.
a equals b*100/20.
a equals 5 b.
b equals a/5.
Implies b equals 20 percentage of a.
Gurkirat said:
1 decade ago
Good solutions all.
Neha said:
1 decade ago
20% of a = b.
Let a = 100.
= 20/100*100 = 20.
b = 20.
= 20/100*20 = 4.
4% of a.
Let a = 100.
= 20/100*100 = 20.
b = 20.
= 20/100*20 = 4.
4% of a.
Uthaya Rani.S said:
1 decade ago
20/100*a = b.
20% of b = ?
20/100*b = 20a/100*20/100.
(Because b = 20a/100, so 20b/100 = 400/1000).
Answer = 4a/100 => 4%.
20% of b = ?
20/100*b = 20a/100*20/100.
(Because b = 20a/100, so 20b/100 = 400/1000).
Answer = 4a/100 => 4%.
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