Question

You spend $115 on groceries each month how much do you spend in a week.

Answer 1

Actually, this depends on how many weeks in a month. Most just say 4, so the answer is 115/4 is the amount per week.

But as everyone knows, there are more than 4 weeks in a month , so it really is more complicated.

There are 365 days in a year, 7 days a week, so ..365/7=52.1 weeks in a year,
52.1/12=4.34 weeks per month.

So technically, one ought to say
115/4.34=26.46 per week. I doubt if your teacher was expecting that answer.