To solve this question we have to make deduct these 2 years. 2120 minus 1974 will give the answer.
You are 146 years old.
(1752 months are passed.)
From 1974 to 2120 there are 146 years. If you want to learn your age in 2120 (born in 1974) your age is 146.
Let's see what will be your age if you born +1 or -1 from that date.