Answer: You can decide to choose any of these but they're all the same!
8 R 1
Decimal form:
8.1 (if you round it to the nearest tenths).
8.14 (if you round it to the nearest hundredths).
8.143 (if you round it to the nearest thousandths).
Explanation:
When you begin the division, you have to think of what is the highest number that is less than 57 that is a multiple of 7, that number is 56. 56/7 is 8 which is where I got the 8.
57 - 56 = 1 which is the remainder.
If you want to write it in decimal form, you divide the 1 by 7 and since you'll get a decimal number with 0.14.. you had that number to 8, which gives you your answer in decimal form!
Hope that helped!