What's the answer to this plz!?!

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?

The anwser cause i do not understand just plez

Calculate the annual effective interest rate of a 12 % nominal annual interest rate compound monthly