To solve this question we have to make deduct these 2 years. 2090 minus 1973 will give the answer.
You are 117 years old.
(1404 months are passed.)
From 1973 to 2090 there are 117 years. If you want to learn your age in 2090 (born in 1973) your age is 117.
Let's see what will be your age if you born +1 or -1 from that date.