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 6 of 7.
Sid said:
9 years ago
Why we put b as 1?
Raj said:
9 years ago
20% of a=b.
20 ÷ 100 of a = b.
a = 5b. b = a ÷ 5.
1 ÷ 25 of a = (1 ÷ 25) * 100 of a = 4%.
20 ÷ 100 of a = b.
a = 5b. b = a ÷ 5.
1 ÷ 25 of a = (1 ÷ 25) * 100 of a = 4%.
Hari said:
8 years ago
20% of a = b,
20/100 of a = b,
0.2 of a =b,
b% of 20.
0.2/100a * 20,
2/10 * 20a,
4%.
20/100 of a = b,
0.2 of a =b,
b% of 20.
0.2/100a * 20,
2/10 * 20a,
4%.
Aditya said:
9 years ago
Let a =100 Now 20% of a i.e. 100 * 20/100 = 20 Rs.
Means 100 Rs of a = 20 Rs of b.
It means 1 Rs of a = 20/100 of b i.e 1/5 Rs.
Now, 20% of 1/5 = 20 * 1/5 = 4 Rs.
Means 100 Rs of a = 20 Rs of b.
It means 1 Rs of a = 20/100 of b i.e 1/5 Rs.
Now, 20% of 1/5 = 20 * 1/5 = 4 Rs.
Ronalo said:
8 years ago
Thanks @Arun.
Samarth upalkar said:
8 years ago
20% of a=(a/5)=b.
b% of 20 = ((a/5)/100) * 20,
= (a/500) * 20.
= (4/100) * a,
= 4% of a.
b% of 20 = ((a/5)/100) * 20,
= (a/500) * 20.
= (4/100) * a,
= 4% of a.
Ram Mahes said:
8 years ago
Thank you so much @Kcs.
Yash chavan said:
8 years ago
Suppose a=100.
then b=20%a,
b=20/100*100 (a=100),
b=20,
Means if b=20.
20% of 20=20/100*20.
= 4%.
then b=20%a,
b=20/100*100 (a=100),
b=20,
Means if b=20.
20% of 20=20/100*20.
= 4%.
Babar said:
9 years ago
Excellent @Neha.
Chakresh patel said:
9 years ago
Nice @Arun, really it's very good explanation.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers