1)

A student earned a grade of 80% on a math test that had

20 problems. How many problems on this test did the

student answer correctly? (round to the nearest whole

number) 87

number of questions = 20

her score in percentage = 80%

therefore, 20/20*100=100

the number of correct questions are unknown that is £

£/20*100=80

100€/20 = 80

£=80*20/100

£=16

16

Step-by-step explanation:

Number of problems in the math test = 20

The student earned 80%

Therefore

Number of problems answered correctly in the test by the student

= 80% of 20

Make 80% a decimal

= 80/100 x 20

= 0.8 x 20

= 16

The student answered 16 questions correctly