To solve this question we have to make deduct these 2 years. 2117 minus 1975 will give the answer.
You are 142 years old.
(1704 months are passed.)
From 1975 to 2117 there are 142 years. If you want to learn your age in 2117 (born in 1975) your age is 142.
Let's see what will be your age if you born +1 or -1 from that date.