Dominic invited his friends to a bonfire. 1/5 of his friends arrived before 7:00pm. 2/5 arrived between 7:00 pm and 8:00 pm. What fraction of his friends had arrived by 8:00 pm?
1/5+ 2/5 = 3/5
3/5 of his friends had arrived by 8.
=^._.^=
