Final answer:
The fraction equivalent to the distance left in Rebecca's race is 19/25.
Step-by-step explanation:
To find the fraction that is equivalent to the distance left in Rebecca's race, we need to first determine the total distance of her race. Let's assume that Rebecca's total race distance is 1 mile. If she has 0.76 miles left to go, the fraction equivalent to the distance left is 0.76/1, which can be simplified to 76/100 or 19/25.