To solve this question we have to make deduct these 2 years. 2100 minus 1981 will give the answer.
You are 119 years old.
(1428 months are passed.)
From 1981 to 2100 there are 119 years. If you want to learn your age in 2100 (born in 1981) your age is 119.
Let's see what will be your age if you born +1 or -1 from that date.