To solve this question we have to make deduct these 2 years. 2090 minus 1981 will give the answer.
You are 109 years old.
(1308 months are passed.)
From 1981 to 2090 there are 109 years. If you want to learn your age in 2090 (born in 1981) your age is 109.
Let's see what will be your age if you born +1 or -1 from that date.