Four feet are cut from a 12-foot board , It will decrease 33.3 % in length.
According to the question,
In order to find the percent decrease in length,we will check the amount of loss which will be divided by original number and then multiplied by 100.
Because we find the amount loss in terms of total amount - percent.
The amount loss =4 foot.
[tex]\rm \dfrac{4feet}{12feet} =0 .3333[/tex]
On multiply by 100 we get 33.3% decrease .12 foot to 8 foot = 33.3 % decrease.
Therefore, Four feet are cut from a 12-foot board , It will decrease 33.3 % in length.
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