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 7 of 7.
Chakresh patel said:
9 years ago
Nice @Arun, really it's very good explanation.
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.
Sid said:
9 years ago
Why we put b as 1?
Babar said:
9 years ago
Excellent @Neha.
Kowsigan said:
9 years ago
Fresh grapes contain 80% water by weight and when the grapes are died, raisins contain 25% by weight.
How many kgs of fresh grapes are needed to get 20kg of raisins?
Please someone explain to solve this.
How many kgs of fresh grapes are needed to get 20kg of raisins?
Please someone explain to solve this.
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%.
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.
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