Question 958604
First off, it's dimensions. 
Typically spelling doesn't count but you were way off.
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Now for a box,
{{{V[1]=L*W*H}}}
If we halve the dimensions,
{{{V[2]=(L/2)*(W/2)*(H/2)
{{{V[2]=(L*W*H)/8}}}
{{{V[2]=V[1]/8}}}
The new volume is {{{1/8}}} of the original volume.