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)  Choose the correct choice:
A) 36 problems
B) 53 problems
C) 27 problems
D) 16 problems
E) 18 problems
Multiply the opposites:   80/100=x/20   80 x 20 = 1600   16 problemsivide by the remaining number:   16/1600   *100   16 problems   correct answer 16 problems
<result>D</result>
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)