Final answer:
The red markers represent 20% of the total number of markers when you calculate the ratio of red to the total number of markers and convert that to a percentage.
Step-by-step explanation:
To determine what percent of the total markers is red, we need to calculate the ratio of red markers to the total number of markers and then convert that ratio to a percentage. The teacher has 56 black dry erase markers and 14 red dry erase markers, which means the total number of markers is 56 + 14 = 70 markers.
Next, we calculate the ratio of red markers to total markers, which is 14 red markers / 70 total markers. To convert this ratio into a percentage, we divide 14 by 70 and multiply by 100. Therefore, the calculation is (14 ÷ 70) × 100, which equals 20%. Option A) 20% is the correct answer because the red markers represent 20% of the total number of markers.