Partitioning a line segment

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

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

Multiply. write your answer in simplest form. 3/8 x 5/7