Q: The length of a rod is 0.45m. It expands to a length of 0.47m.

Find the expansion as apercentageof its original length.

??? Please help if possible.

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- Jan 20th 2009, 04:28 AMisuckatmathsPercentage Problem!
Q: The length of a rod is 0.45m. It expands to a length of 0.47m.

Find the expansion as a**percentage**of its original length.

??? Please help if possible. - Jan 20th 2009, 04:31 AMvincisonfire
$\displaystyle \frac{\text{initial length}}{\text{final length}}=\frac{0.45}{0.47} = 95.745 \%$

- Jan 20th 2009, 04:38 AMisuckatmaths
It seems too simple, thanks though!

- Jan 20th 2009, 04:49 AMsumit2009
I think percentage increase in length

=**[change in length/orig. length] X100**

so, it should be=[0.02/0.45] X 100

am I correct?? - Jan 20th 2009, 04:51 AMsumit2009
Ans- 4.44%

- Jan 20th 2009, 05:18 AMisuckatmaths
Thank you so much sumit2009, you've just confirmed the answer for me.

I thought it was 4.44%

nice one!