Graguity

dear sir,

i want to know about graguity , sir have completed my 4.7year and 21 days of work now i have an given a regignation now i have to complete my 25 days of notice period .

i want to know that i am aaplicable to take graguity or not .

i have seen that 1 year is of 240 days of work ,but we are doing more than 240 days of work in a year so what is consider in this case

please provide me suggestion.