73 is what percent of 125

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?

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.