To solve this question we have to make deduct these 2 years. 2087 minus 1977 will give the answer.
You are 110 years old.
(1320 months are passed.)
From 1977 to 2087 there are 110 years. If you want to learn your age in 2087 (born in 1977) your age is 110.
Let's see what will be your age if you born +1 or -1 from that date.