To solve this question we have to make deduct these 2 years. 2115 minus 1990 will give the answer.
You are 125 years old.
(1500 months are passed.)
From 1990 to 2115 there are 125 years. If you want to learn your age in 2115 (born in 1990) your age is 125.
Let's see what will be your age if you born +1 or -1 from that date.