To determine the fraction of cousins, you have to divide the number of cousins she invited by the total number of guests.
She invited 12 cousins, 6 aunts, 4 brothers, and 2 sisters, a total of 24 guests.
Then:
![\frac{nº\text{cousins}}{\text{total guests}}=(12)/(24)](https://img.qammunity.org/2023/formulas/mathematics/college/5egj0dlj9mc4hqjkuqi1wrkrtyd7p7bh5r.png)
Both, 12 and 24 are divisible by 12, to simplify the fraction, divide the numerator and denominator by 12
![(12/12)/(24/12)=(1)/(2)](https://img.qammunity.org/2023/formulas/mathematics/college/pdg4097nqx2b2mvfhuuf32rlv7zozabaar.png)
The fraction