21 in decimal form can be 21.0 or 21.00 or 21.000, or however many zeros you'd like to write after the decimal point.
It is about 247 years and 8 months.
3.1 hours
There are about 24 months (2 years) in 104 weeks.
It is 8 1/3 years (8.333333333333333333) :)
3 years and 11/12 of a year (fraction) 3.91666667 years (decimal)
18 months = 1 and 1/2 years = 1.5 in decimal
To express 2 years and 3 months as a decimal, you need to convert the months into a fraction of a year. Since there are 12 months in a year, 3 months is equal to 3/12 or 0.25 years. Adding this to 2 years gives a total of 2.25 years, which can be expressed as a decimal as 2.25.
How many months is 3.25 years
4 months, as a decimal, is 4 months. Or, if you prefer, 4.00 months. It does not matter how many 0s you append after the decimal point - except that the greater the number of 0s the greater the implied precision.
71 months is 5.92 years.
4 years and 2 months.
4 years 2 months
5 years and 10 months.
0.75 or 3/4 depending on whether you need a decimal or a fraction. Also the number may be slightly different based on which months of the year are being counted and not counted.
125 months = 10 years and 5 months or 10.416 years
28 months = 2 years and 4 months.