To solve this question we have to make deduct these 2 years. 2099 minus 1960 will give the answer.
You are 139 years old.
(1668 months are passed.)
From 1960 to 2099 there are 139 years. If you want to learn your age in 2099 (born in 1960) your age is 139.
Let's see what will be your age if you born +1 or -1 from that date.