Answer:
14
Step-by-step explanation:
<u><em>Given:</em></u>
<em>A student earned a grade of 70% on a math test that had 20 problems. </em>
<u><em>To Find:</em></u>
<em>How many problems on this test did the student answer correctly? ( round to the nearest whole number)</em>
<u><em>Solve:</em></u>
<em>When I solve these question I have a formula.</em>
<em>Which is</em>
<em>Number of question correctly ÷ Total × 100</em>
<em>Thus,</em>
<em>1/20 × 100 = 5%</em>
<em>2/20 × 100 = 10%</em>
<em>3/20 × 100 = 15%</em>
<em>4/20 × 100 = 20%</em>
<em>5/20 × 100 = 25%</em>
<em>6/20 × 100 = 30%</em>
<em>7/20 × 100 = 35%</em>
<em>8/20 × 100 = 40%</em>
<em>9/20 × 100 = 45%</em>
<em>10/20 × 100 = 50%</em>
<em>11/20 × 100 = 55%</em>
<em>12/20 × 100 = 60%</em>
<em>13/20 × 100 = 65%</em>
<em>14/20 × 100 = 70%</em>
<em>15/20 × 100 = 75% </em>
<em>16/20 × 100 = 80%</em>
<em>17/20 × 100 = 85%</em>
<em>18/20 × 100 = 90%</em>
<em>19/20 × 100 = 95%</em>
<em>20/20 × 100 = 100%</em>
<em />
<em>As you can see that 14/20 × 100 = 70%</em>
<em>Hence, the student answer 14 question correct.</em>
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<u><em>Kavinsky</em></u>