4.75 converted to an improper fraction

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld