What is the fractional abundence for 24Mg?

The fractional abundance of (^{24}\text{Mg}) is the ratio of the number of (^{24}\text{Mg}) atoms to the total number of magnesium atoms in a sample. Typically, (^{24}\text{Mg}) constitutes about 79% of naturally occurring magnesium isotopes, with the remaining isotopes being (^{25}\text{Mg}) and (^{26}\text{Mg}). Therefore, the fractional abundance of (^{24}\text{Mg}) can be expressed as approximately 0.79.