A 2 and a half -liters container is 7 tenths full What decimal fraction of 1 liters is required to fill it?

Well, honey, if the container is 7 tenths full, that means it has 1.75 liters in it. To fill it up to 2.5 liters, you would need 0.75 liters more. So, the decimal fraction of 1 liter required to fill it would be 0.75. Hope that clears things up for you, darling!