We have the string 2022-06-01 11:01:05 ET in Google Sheets and we are looking to compute the difference between this string and =now(). We cannot simply subtract the cells because we cannot subtract a string from a number/date. How can we subtract and get the difference between timestamps (not just dates, precision to the hh:mm:ss would be useful.). The output we are looking for is a simple decimal number representing the time difference, that we can convert into minutes or seconds as needed.
