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 3 of 7.
Naveen said:
10 years 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:
9 years ago
What number is 60% less than 80? Please find and explain it.
Soumya said:
9 years ago
@Sanjit.
80- 60 % (80),
= 80- 60/100 * 80,
= 80- 48,
= 32.
80- 60 % (80),
= 80- 60/100 * 80,
= 80- 48,
= 32.
Rahulj said:
9 years ago
Nice explanation @Arun.
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.
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)
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