To solve this question we have to make deduct these 2 years. 2116 minus 1977 will give the answer.
You are 139 years old.
(1668 months are passed.)
From 1977 to 2116 there are 139 years. If you want to learn your age in 2116 (born in 1977) your age is 139.
Let's see what will be your age if you born +1 or -1 from that date.