Aptitude - Percentage - Discussion
Discussion Forum : Percentage - General Questions (Q.No. 9)
9.
| A student multiplied a number by | 3 | instead of | 5 | . |
| 5 | 3 |
What is the percentage error in the calculation?
Answer: Option
Explanation:
Let the number be x.
| Then, error = | 5 | x - | 3 | x = | 16 | x. |
| 3 | 5 | 15 |
| Error% = |  |
16x | x | 3 | x 100 |  % = 64%. |
| 15 | 5x |
Discussion:
134 comments Page 7 of 14.
Pavithradevi M said:
8 years ago
Gain % = error ÷ false value * 100 if we put this problem by this formula we can't get 64%. Then how to get it?
Kondareddy said:
1 decade ago
So simple friends,
First find error.
error = correct value- wrong value;
error % is = (error/correct value)*100;
First find error.
error = correct value- wrong value;
error % is = (error/correct value)*100;
Swetha said:
1 decade ago
Do anyone please tell me how 16/15 came in the simplification of (5/3) - (3/5).
(5/3) - (3/5) = 16/5 how?
(5/3) - (3/5) = 16/5 how?
Nippu said:
1 year ago
Sol:
Error %= (difference/original value)*100.
= [{(5/3)-(3/5)}/(5/3)]*100.
= 64%.
Error %= (difference/original value)*100.
= [{(5/3)-(3/5)}/(5/3)]*100.
= 64%.
(87)
Prabesh Satyal said:
5 years ago
Good @Alpesh.
Before determining no 15 for a multiple of ratios one has to do LCM of the denominators.
Before determining no 15 for a multiple of ratios one has to do LCM of the denominators.
Yugank Garg said:
1 decade ago
(3X/5) *100/ (5x/3) = 36%.
It means 3X/5 is 36% of original 100%.
Therefore percentage error is 64%.
It means 3X/5 is 36% of original 100%.
Therefore percentage error is 64%.
Deepak Kumar MR said:
6 years ago
(3/5)/(5/3) = 9/25 so in fractions it is 0.36 minus this value with 1-0.36 = 0.64 which is 64%.
Kesava kumar said:
1 year ago
It's very simple: 3/5/5/3 * 100 = 9/25 * 100 = 9*4 = 36.
Total percentage = 100.
100 - 36 = 64%.
Total percentage = 100.
100 - 36 = 64%.
(78)
Anjali said:
5 years ago
How 5/3 - 3/5 be 16/5???? it is 16/15.
Now,the answer should be 16/15 * 3/5 *100 = 34%.
Now,the answer should be 16/15 * 3/5 *100 = 34%.
Rashmi said:
1 decade ago
But, still I'm not able to understand the logic for error %. Can any one describe it.
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