How many weeks in 18 months?

Answer 1

You need to work it out this way

We know by definition that there are 52 weeks in 12 months.

so:

52/12 = the number of week in 1 month. 4.3333

So if 1 month = 4.3333 weeks, 18 months = 4.3333*18 = 77.9994 weeks.

Answer 2

There are 78 weeks in 18 months. This is calculated by multiplying 18 months by the average number of weeks in a month (4.33 weeks).