Answer: The answers is, 1.77777, repeated 7s
Step-by-step explanation: The explanation if you need to show your work is: Start with the goal of (48 books). Subtract the number of books already read (16 books read).
(48 - 16) = 32 books left to read.
You must then take the other given of 18 weeks left to complete said goal of (48 books) and divide the number of books left (32 books to read) by the amount of time left (18) weeks to complete the desired goal.
(32 / 18) = 1.77777
Therefore, the answer to your question is that Gracie must read 1.777 books per week to complete her goal on time.
Good Luck, Hope this helps.