To solve this question we have to make deduct these 2 years. 2120 minus 1955 will give the answer.
You are 165 years old.
(1980 months are passed.)
From 1955 to 2120 there are 165 years. If you want to learn your age in 2120 (born in 1955) your age is 165.
Let's see what will be your age if you born +1 or -1 from that date.