Answer:
at least 5
Explanation:
You want to know the number of cups needed to contain 7/8 pitcher of water when each cup holds 3/16 pitcher.
Cups
The number of cups can be found by dividing the water quantity by the amount each cup holds:
(7/8 pitcher)/(3/16 pitcher/cup) = 14/3 cups = 4 2/3 cups
Eve needs at least 5 cups to hold the amount of water in the bottle.
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Additional comment
If every cup is filled to capacity, then the 5th cup will be 2/3 full. The number of cups can be any number greater than or equal to 5.
If you want, you can write an inequality relating the capacity of the cups to the amount of water:
n(3/16) ≥ 7/8
n ≥ 4 2/3 . . . . . . . . . where n is a counting number
n ∈ {5, 6, 7, ...}
This more clearly shows that the number is not restricted to 5.