What number is halfway between 0.5 and 0.75?

The number halfway between 0.5 and 0.75 can be calculated by finding the average of the two numbers. Add 0.5 and 0.75 together, which equals 1.25. Then, divide by 2 to find the average, which is 0.625. Therefore, 0.625 is the number halfway between 0.5 and 0.75.