To solve this question we have to make deduct these 2 years. 2099 minus 1980 will give the answer.
You are 119 years old.
(1428 months are passed.)
From 1980 to 2099 there are 119 years. If you want to learn your age in 2099 (born in 1980) your age is 119.
Let's see what will be your age if you born +1 or -1 from that date.