To solve this question we have to make deduct these 2 years. 2100 minus 1972 will give the answer.
You are 128 years old.
(1536 months are passed.)
From 1972 to 2100 there are 128 years. If you want to learn your age in 2100 (born in 1972) your age is 128.
Let's see what will be your age if you born +1 or -1 from that date.