Express: (a)
as per cent
(b)
% as decimal (c) 5:8 as per cent

What is best way to getting answer for my exam is

Find the area of a parallelogram with base 15 yards and height 21 2/3

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement