To solve this question we have to make deduct these 2 years. 2118 minus 1989 will give the answer.
You are 129 years old.
(1548 months are passed.)
From 1989 to 2118 there are 129 years. If you want to learn your age in 2118 (born in 1989) your age is 129.
Let's see what will be your age if you born +1 or -1 from that date.