We are given 
Detective Pi has 5 1/5 quarts of orange juice
we can write in fraction form
we get 


so, 
Detective Pi has 
 quarts of orange juice
 quarts of orange juice
Let's assume 
total number of mornings is x
She likes to have 2/5 of a quart every morning
so, 
total quantity of juice = total number of morning*She likes to have 2/5 of a quart every morning
total quantity of juice is 

now, we can set it equal to 26/5

now, we can solve for x
we can multiply both sides by 5 


divide both sides by 2
we get 

so, total number of mornings is 13..........Answer