The amount of the sandwich they had eaten is 4/5 then the remaining amount of the sandwich is 1/5.
What is a fraction number?
A fraction number is a number that represents the part of the whole, where the whole can be any number. It is in the form of numerator and denominator.
Mick and Jackie buy a large sandwich to share. They each eat 2/5 of the sandwich.
The total amount of the sandwich they had eaten will be
[tex]\rightarrow \dfrac{2}{5} + \dfrac{2}{5} = \dfrac{4}{5}[/tex]
The sandwich remaining will be
[tex]\rightarrow 1-\dfrac{4}{5} = \dfrac{1}{5}[/tex]
More about the fraction number link is given below.
https://brainly.com/question/78672
