Answer:
51..
Step-by-step explanation:
I do it as follows:
31671/68 = 465.75
we took the integer part of the result, that is 465 and multiply
465*68 = 31620 and finally we substract 31671 - 31620 to find the remainder:
31671 - 31620 = 51.
Then, the remainder is 51.