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A mill processes \( 1000 \) kg of wheat and produces \( 760 \) kg of flour. The extraction rate is

  • A.76.0 per cent
  • B.24.0 per cent
  • C.131.6 per cent
  • D.68.0 per cent

Answer: A

Correct answer: 76.0 per cent

Extraction rate is flour as a percentage of the wheat milled:

\[ \frac{760}{1000} \times 100 = 76.0\ \mathrm{per\ cent} \]

The distractor \( 24.0 \) is the offal - the bran and germ that did not become flour. A 76 per cent extraction is a typical straight-run white flour: high enough to be commercially efficient, low enough to leave most of the bran and germ behind and give a light, low-ash product.

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