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:
135 comments Page 9 of 14.
Chandu said:
5 years ago
5/3 - 3/5 = (5(5)-3(3))/15 = 16/15.
(16/15)/(3/5) x 100 = 64%.
(16/15)/(3/5) x 100 = 64%.
(1)
Srilekha said:
8 years ago
If we get error as a negative number them what we have to do?
Jagadeesh said:
8 years ago
@Sasi.
How can you write (3/5) (3/5) (5/3) can you explain?
How can you write (3/5) (3/5) (5/3) can you explain?
Alpesh said:
5 years ago
15 * 3/5 = 9,
5/3 * 15 = 25,
25 - 9 = 16,
16/25 * 100 = 64%.
5/3 * 15 = 25,
25 - 9 = 16,
16/25 * 100 = 64%.
Pooja said:
4 years ago
@Pradip Zala: at last, why we take 100/500. Can you explain?
M.Lokesh said:
3 years ago
Error comes from true value so;.
Error% = error/true value.
Error% = error/true value.
(18)
R.SRAVAN said:
2 decades ago
If error came a negative value then what is the solution?
(1)
Vengamanaidu said:
9 years ago
Thank you @Michael, your explanation is the best method.
Lee said:
7 years ago
Can anyone help me to understand the solution? please.
Raghava said:
8 years ago
I can't this. So, please explain me in a simple way.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers