We always count the total years of experience from the experience section block. It will be picked up from the date of joining to the last date of the experience. The way of calculating or count depends on how long in years and months the employee has been working in all companies.
If in the summary block or any other section, the candidate has mentioned the experience in years (Like 11+ years, 16+ years, etc.), we extract that experience too. Then compare both of the experiences and a maximum of them will be considered as the total year of experience.
The parser is extracting the year of experience as a string value, not a decimal value. So if the parser extracts 4.7 years means 4 years and 7 months
If the job period is like Jan 2017 - Nov 2021, then the year of experience will be 4.11 years (i.e. 4 years and 11 months)
You can always contact RChilli Support via creating a ticket at RChilli Helpdesk or by sending an email at firstname.lastname@example.org. The support team will help you in understanding more about the Experience count.