Calculate age with month inclusive

Calculating Age from Date of Birth works. But I would like the Age accurate to the month. For example:

1. 40 years and 3 months old
2. 40.3 years

below is the code for the AGE I calculated. What do I add to get the number of months as above?
{{applicant_data_detail.data.a01_DoB.yearsUntil(currentDateAndTime.datetime)