To solve this question we have to make deduct these 2 years. 2117 minus 1979 will give the answer.
You are 138 years old.
(1656 months are passed.)
From 1979 to 2117 there are 138 years. If you want to learn your age in 2117 (born in 1979) your age is 138.
Let's see what will be your age if you born +1 or -1 from that date.