Coin share

In a temple corridor, two travelers were sitting. By time, there was a heavy rain, and another travller came. The 3^rd traveler asked others if he can join them for that night due to heavy rain. The 1^st and 2^ndtraveler welcomed him. After sometime, 3^rd traveler said he is hungry and donot have anything to eat and asked if they have anything to eat.

1st traveler said he has 3 bread pieces and 2^nd traveler said he has 5 bread pieces.  So total is 8 bread pieces and wondered how to share equally among them. 

The 3^rd traveler said he has an idea and that each bread pieces can be cut into 3 small pieces, so that it will amount to 24 small bread pieces and they can share 8 each.

Accepted on the wonderful proposal, they divided equally. And thereafter, they slept.

In the morning while leaving, the 3^rd traveler gave them 8 gold coins to be shared between 1^st and 2^nd traveler.

1^st traveler said each can take 4 gold coins, whereas 2^nd traveler said, it is to be shared 3 for 1^sttraveler and 5 for him. But the sharing was not mutually agreed.

They approached a learned person who after so much thinking, declared 1 gold coin to 1^st traveler and 7 to the 2^ndtraveler. When refuted by the travelers, he said a logic.

What is the logic?