To find this answer you must first make 40% into a decimal. To do so, simply divide 40 by 100. This will give you 0.4.
Next, you divide 84 by 0.4. You divide because the percentage of a number is found by multiplying said number by the decimal form of the percent. Since we arent looking for the percentage of a number, but rather the number from which the percentage came, we do the opposite operation.
84 ÷ 0.4 = 210. Thus meaning 210 miles is your answer.
