Can you answer this problem

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?

When y’all answer can y’all explain too !

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?