The difference between -18 and 68 is 86.
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15
3.7778
-68
68 percent
To calculate the percent change from 68 miles to 42.5 miles, you first need to find the difference between the two values, which is 68 - 42.5 = 25.5 miles. Next, you divide the difference by the original value (68) to get 25.5 / 68 ≈ 0.375. Finally, multiply this result by 100 to convert it to a percentage, which gives you a percent change of approximately 37.5%.