How is a triangle alike to a square

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

If you answer 2+2 you will get over 80 points

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4