If one-fifth of the art group is transferred to the calligraphy group, it will be equal, which means that the art group is five-fifths and the calligraphy group is three-fifths, 5/5-1/5=4/ 5,3/5+1/5=4/5. This is equal. However, the question does not give a specific number, so there are countless answers: n 5/5 people for the art group, n 3/5 people for the calligraphy group.