To solve this question we have to make deduct these 2 years. 2090 minus 1961 will give the answer.
You are 129 years old.
(1548 months are passed.)
From 1961 to 2090 there are 129 years. If you want to learn your age in 2090 (born in 1961) your age is 129.
Let's see what will be your age if you born +1 or -1 from that date.