Sorry, I missed this at the time somehow.
Below are my assumptions and subsequent calculations from a by now hazy recall of how it's done.
Assuming that added on to your 887 existing contributions were about another 39 for the year 2023 plus 52 for 2024 plus 52 for 2025 (not sure about all that) that would give you a total of 887 + 143 = 1030 contributions
You started in the year 1990 to 1991 and finish in the year 2025 which is 36 years inclusive.
1030/36 makes for an average of 28.6 contributions per year
Under the averaging method alone this would have given you €246.30, the current full pension of €289.30
Under the total contributions method alone you'd have (1030/2080) * 289.30 = €143.26
In 2025 the split is 90% averaging and 10% total contributions*
So your actual pension should be (0.9 * 246.3) + (0.1* 143.26) = €236
So if I am correct you'll be getting 81.57% of the full contributory pension
AFAIK they seem to have begun implementing the transition a year later than originally planned, ie in 2025 rather than 2024
From 1 January 2025, if you apply for the State Pension (Contributory), there is a new way of calculating your rate of payment.
www.citizensinformation.ie