As each chair needs 12.6667 feet lumber.So 15 chairs will need 15*12.6667=190.0005 lumber
The quadrilateral is either a square or a rectangle as all angles are the same measure (90 degrees)
If we take 1200 as the 100%, how much percentage is 700 of it?
well

so, (175/3)% or roughly 58.3%
now, how much is (175/3)% of 15000 ?
well, if we take 15000 as the 100%
then