Pls help.

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?

Pls! does anybody know a shortcut for answering these types of questions in the future?

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8