Final answer:
Viviana's percent change in jogging time is calculated as (18 minutes change / 40 minutes original) × 100, resulting in a 45% decrease in her jogging time for 2 miles.
Step-by-step explanation:
The question asks to calculate the percent change in the time it takes Viviana to jog 2 miles, going from 40 minutes to 22 minutes. First, we find the difference in time: 40 minutes - 22 minutes = 18 minutes. Now, we will use the percent change formula, which is (change/original) × 100. In this case, the change is 18 minutes, and the original time is 40 minutes.
Percent change = (18 / 40) × 100 = 0.45 × 100 = 45%
Therefore, the correct answer is A. 45% change in the time it took Viviana to jog 2 miles.