To solve this question we have to make deduct these 2 years. 2105 minus 1977 will give the answer.
You are 128 years old.
(1536 months are passed.)
From 1977 to 2105 there are 128 years. If you want to learn your age in 2105 (born in 1977) your age is 128.
Let's see what will be your age if you born +1 or -1 from that date.