Me. this is for my math test.

13.) in mr. diaz’s class, 20% of the students received a grade of “a” on their report cards. there are 25 students in and. diaz’s class. how many students received a grade of “a” on their report card?

12.) larissa asked 40 students to name their favorite food. 10 students said their favorite food was pizza. what percent said their favorite food was pizza?

16.) what is the decimal equivalent to 40% ?

17.) edison has a bag of 300 marbles. 25% of the marbles are blue. how many marbles in the bag are blue?

20.) luisa hiked 7 miles of a 21-miles trail. what percent of the trail did she hike?

21.) what number is 15% is 50?

22.) lindsay ate 7/8 of an apple. what percent of the apple did he eat?

23.) batak spent $20 at the arcade. this represents 10% of the money he earned by working at the pizza parlor by last week. how much money did barack earn at the pizza parlor last week?

15.) theo correctly answered 49 out of 50 questions on his spelling quiz. what percent of the questions did theo answer correctly? express as a percent and a decimal.