Final answer:
The percent increase in the distance Rebecca lives from Jackie is 125%, calculated by taking the change in distance (25 miles), dividing by the original distance (20 miles), and multiplying by 100.
Step-by-step explanation:
The student asked how to calculate the percent increase in the distance from Rebecca's new house to her best friend Jackie's house. Originally, Rebecca lived 20 miles away, and now she lives 45 miles away. The percent increase can be found using the formula:
Percent Increase = (New Distance - Original Distance) / Original Distance x 100%
Plugging the values into the formula gives us:
Percent Increase = (45 miles - 20 miles) / 20 miles x 100% = 25 miles / 20 miles x 100%
So, the percent increase is 125%. Thus, the distance Rebecca lives from Jackie has increased by 125%.