To solve this question we have to make deduct these 2 years. 2100 minus 1957 will give the answer.
You are 143 years old.
(1716 months are passed.)
From 1957 to 2100 there are 143 years. If you want to learn your age in 2100 (born in 1957) your age is 143.
Let's see what will be your age if you born +1 or -1 from that date.