Most of the metal in the Model-T, a car built by Henry Ford from 1908 to 1926, was an alloy of steel and vanadium. Mixing a small amount of vanadium in with the steel makes it a little lighter, but it still maintains much of its strength. There are two isotopes of vanadium: V-50 (49.947 amu) and V-51 (50.944 amu). What is the percent of abundance of each isotope if the average atomic mass of vanadium is 50.942?