To solve this question we have to make deduct these 2 years. 2115 minus 1973 will give the answer.
You are 142 years old.
(1704 months are passed.)
From 1973 to 2115 there are 142 years. If you want to learn your age in 2115 (born in 1973) your age is 142.
Let's see what will be your age if you born +1 or -1 from that date.