To solve this question we have to make deduct these 2 years. 2101 minus 1991 will give the answer.
You are 110 years old.
(1320 months are passed.)
From 1991 to 2101 there are 110 years. If you want to learn your age in 2101 (born in 1991) your age is 110.
Let's see what will be your age if you born +1 or -1 from that date.