Length of wooden flooring strip =
or 
Length of strip cut off =
or 
So, the new length of the strip will be=

=
Hence, the new length of the flooring strip will be
inches and in mixed fraction it will be
inches.
The percent error of this problem is 5.85% error.
So your answer according to these hints I provided for you, should lead you to your answer, which should in other words be,
The 1st. The 2nd. And I would say...The 4th. The reason why I say not the 3rd one is because the 4 has nothing to do with the 8, the 3 does because it's divided by it.
If it's not useful, feel free to report for mistake in answer. -_-
For what problem
Answer pls