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 13 of 14.
Saswat said:
1 decade ago
I m also unable to understand. Can you please make me understand. Is this formula is applicable to every situation ?
Rashmi said:
1 decade ago
But, still I'm not able to understand the logic for error %. Can any one describe it.
Arun said:
1 decade ago
Thank you guys. Good analysis.
S.salman said:
1 decade ago
Thanks srihari.
Kishna said:
1 decade ago
Thanks Sreekutty.
(1)
Sreekutty said:
1 decade ago
Error %= error / true value
but, here.. error= true value-false value
ie., error=(5/3)-(3/5)=16/5
so the error % will be equal to (16/5)/(5/3)=64%
(since, true value is 5/3)
but, here.. error= true value-false value
ie., error=(5/3)-(3/5)=16/5
so the error % will be equal to (16/5)/(5/3)=64%
(since, true value is 5/3)
Jack said:
1 decade ago
Error% = error/true value
Ashok said:
1 decade ago
Thanks Sri.
Jananipriya.P. said:
1 decade ago
Thank you Hari!
Srihari said:
1 decade ago
No need of taking x. The difference of two nos become 16/15.
Then the percentage of 16/15 in the true value 5/3 is 64%.
16/15
------ x 100 = 64%. Thats logic Jananipriya.
5/3
Then the percentage of 16/15 in the true value 5/3 is 64%.
16/15
------ x 100 = 64%. Thats logic Jananipriya.
5/3
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