To solve this question we have to make deduct these 2 years. 2117 minus 1974 will give the answer.
You are 143 years old.
(1716 months are passed.)
From 1974 to 2117 there are 143 years. If you want to learn your age in 2117 (born in 1974) your age is 143.
Let's see what will be your age if you born +1 or -1 from that date.