Naina was given 
piece of cake and Najma was given
piece of cake. Find the total amount of cake was given to both of them.
It is given in the question that,
Fraction got by Naina = 1
=
Also,
Fraction got by Najma = 1
= 
Therefore,
Total amount of cake given to them = 
+ 
= 
= 
= 
= 2
3