To solve this question we have to make deduct these 2 years. 2109 minus 1969 will give the answer.
You are 140 years old.
(1680 months are passed.)
From 1969 to 2109 there are 140 years. If you want to learn your age in 2109 (born in 1969) your age is 140.
Let's see what will be your age if you born +1 or -1 from that date.