To solve this question we have to make deduct these 2 years. 2117 minus 1991 will give the answer.
You are 126 years old.
(1512 months are passed.)
From 1991 to 2117 there are 126 years. If you want to learn your age in 2117 (born in 1991) your age is 126.
Let's see what will be your age if you born +1 or -1 from that date.