Division 3 The lean meat content of the carcase shall be calculated according to the following formula:
United Kingdom
ŷ = 66,6708 – 0,3493 × F where:
ŷ F
the estimated percentage of lean meat in the carcase,
the thickness of back fat (including rind), measured on the left side of the carcase behind the last rib 6 cm off the midline of the carcase (in millimetres).
The formula shall be valid for carcases weighing between 60 and 110 kilograms.