Grayson did not simplify the question
I am not to sure but I would go for B. identity.
Answer: 6 recipes
Step-by-step explanation: Just divide the 6 cups of buttermilk by 7/8 because each recipe need 7/8 cup of butter milk. You will get a number like this 6.857142857142857 (there are probably more decimals that come after it.) But, all the numbers after the 6 are useless because more recipes can't be made with those because you need at least 7/8 cups for one recipe. So, this will make 6 recipes. Hope this helps!
79.8 is the discount of the price of an armchair that originally cost $266.00......... because 266.00÷30%=79.8