Final answer:
To make 5/6 of a whole recipe, Bjorn will need 1 1/24 L of water.
Step-by-step explanation:
To solve this problem, first find the total amount of water needed for a whole recipe. Then, multiply that by 5/6 to find the amount of water needed for 5/6 of a whole recipe.
The total amount of water needed for a whole recipe is 1 1/4 L. To find 5/6 of this amount, multiply 1 1/4 by 5/6.
1 1/4 * 5/6 = 5/4 * 5/6 = 25/24 = 1 1/24 L.
So, Bjorn will need 1 1/24 L of water to make 5/6 of a whole recipe.