# Commission Implementing Decision (EU) 2015/2100 of 18 November 2015 authorising methods for grading pig carcases in Latvia and repealing Decision 2005/307/EC (notified under document C(2015) 7986) (Only the Latvian text is authentic), Division 3: The lean meat content of the carcase shall be calculated according to the following formula:

Extent: E+W+S+N.I.

ŷ = 66,7787 – 0,4464 × F + 0,0018 × M
where:
ŷ the estimated percentage of lean meat in the carcase,
F the thickness of back fat (including rind), measured between the last rib and the second to last rib, 7 cm of the midline of the carcase (in millimetres),
M the thickness of the muscle, measured between the last rib and the second to last rib, 7 cm of the midline of the carcase (in millimetres).
The formula shall be valid for carcases weighing between 60 and 110 kilograms.

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Source: https://www.legislation.gov.uk/eudn/2015/2100/annex/part/IV/division/3 (the official version)
Page: https://openlegislation.uk/eu-decision-2015-2100/annex/part-IV/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.