Last year, there were 120 students in the marching band. This year, there are 138.
What is the percentage of increase or decrease?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Having a hard time understanding this question (see attachment).