A rare book was purchased for $200 and then it was sold for $400. What percent increase was that

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Runner ran 1 4/5 miles on monday and 6 3/10 on tuesday. how many times her monday’s distance was her tuesdays distance

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 its length what is the length of lewis's basement