Question

A clerk writes 9 in place of 90. He commits an errror % of

Answer 1

Answer:

10%

Step-by-step explanation:

% error=(incorrect value/original value )*100

hope it helps

Answer 2

Answer:

The percentage error committed by the clerk in writing is found to be 90%.

Step-by-step explanation:

We know that the formula for calculating the percentage error of any quantity is given as follows:

$error(\%)=\frac{x-x'}{x}\times 100$

where $x$ is the actual quantity which is to be ideally measured and $x'$ is the incorrect value that is measured instead of $x$.

Here, the actual value which was to be measured was 90 but the value that was written instead was 9, so we can say:

$x=90\\x'=9$

Substituting these in the expression for calculating error, we get:

$error(\%)=\frac{90-9}{90}\times 100$

$error(\%)=\frac{81}{90}\times 100$

Simplifying it, we get:

$error(\%)=0.9\times 100$

or we can say:

$error(\%)=90\%$

Thus, the error committed in the writing of value is found to be 90%.