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
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