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 6 of 14.
Jatin Kumar said:
3 weeks ago
Let assume the number of 60.
now 3/5 * 60 = 36,
5/3 * 60 = 100.
Then the number is multiplied in to 100%.
36/100*100 = 36,
100-36 = 64.
now 3/5 * 60 = 36,
5/3 * 60 = 100.
Then the number is multiplied in to 100%.
36/100*100 = 36,
100-36 = 64.
(4)
Vijayakumar said:
1 decade ago
Error% = (true value-false value)*100/true value.
% of error = ((5/3)-(3/5))*100/(5/3).
= (16/15)*100*(3/5).
= 64%.
% of error = ((5/3)-(3/5))*100/(5/3).
= (16/15)*100*(3/5).
= 64%.
Priyanka bhumbar said:
9 months ago
Let a 45 no consider any number.
3/5 * 45 = 27
5/3 * 45 = 75.
Then the number is multiple into 100%.
27/75 * 100 = 36
100 - 36 = 64%.
3/5 * 45 = 27
5/3 * 45 = 75.
Then the number is multiple into 100%.
27/75 * 100 = 36
100 - 36 = 64%.
(46)
Guru said:
4 years ago
Lets take the number is 15.
Correct value is 5/3*15 = 25.
The error value is 3/5 * 15 = 9,
The difference is 11,
So 11/25*10 = 64.
Correct value is 5/3*15 = 25.
The error value is 3/5 * 15 = 9,
The difference is 11,
So 11/25*10 = 64.
(6)
Madangopal Laturkar said:
3 years ago
Take base number and multiply it;
5 * 3 = 15.
Then,
15 * 3/5 = 9,
15 * 573 = 25,
Difference 25 - 9 = 16.
16/25 * 100 = 64%.
5 * 3 = 15.
Then,
15 * 3/5 = 9,
15 * 573 = 25,
Difference 25 - 9 = 16.
16/25 * 100 = 64%.
(49)
Madhu said:
8 years ago
Error%={(true value-false value)/true value}*100.
={(5/3-3/5)/5/3}*100,
={16/25}*100,
=64%.
={(5/3-3/5)/5/3}*100,
={16/25}*100,
=64%.
PRIYANKA said:
1 decade ago
True = 5/3.
False = 3/5.
Then false/true*100 = 3/5/5/3*100 = 36% WHICH IS CORRECT %.
TO FIND ERROR PERCENTAGE 100-36 = 64%.
False = 3/5.
Then false/true*100 = 3/5/5/3*100 = 36% WHICH IS CORRECT %.
TO FIND ERROR PERCENTAGE 100-36 = 64%.
Shiv kumar said:
1 decade ago
Let no. be 100.
100*(3/5) = 60.
100*(5/3) = 166.65.
Error = (true value - false value)/true value.
Error% = error*100.
100*(3/5) = 60.
100*(5/3) = 166.65.
Error = (true value - false value)/true value.
Error% = error*100.
Avnish said:
1 decade ago
If i multiply 15 to both 3/5 and 5/3 the ans is
9 and 25 but 9 is not 64 % of 25...
can some one tell me this thing...
9 and 25 but 9 is not 64 % of 25...
can some one tell me this thing...
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 ?
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