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 13 of 14.
Satish said:
6 years ago
Thanks for the explanation @Pradeep and @Jack.
Sanjay said:
6 years ago
How did 16 come?
Satyam said:
6 years ago
Thanks @Pradip.
Anirudh said:
6 years ago
Error = true value - false value.
Percentage of x = x*100 / true value.
Percentage of x = x*100 / true value.
Surya said:
6 years ago
Take example 150.
150*3/5 = 90.
150*5/3 = 250.
90/250*100 = 36.
100-36 = 64%.
150*3/5 = 90.
150*5/3 = 250.
90/250*100 = 36.
100-36 = 64%.
Srikanth said:
6 years ago
Thank you @Pradip.
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%.
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%.
Siva said:
5 years ago
Let take the number be 30.
30*(5/3) = 50.
30*(3/5) = 18.
The difference between both which is the error value is 32.
To find error percentage;
(32/50) * 100 = 64%.
30*(5/3) = 50.
30*(3/5) = 18.
The difference between both which is the error value is 32.
To find error percentage;
(32/50) * 100 = 64%.
Umesh chandra said:
5 years ago
How it will be? could you please explain?
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