Farsi - Statistical proportions (dar)

When mixing metals for an alloy or monitoring a casting process, you often need to express exact proportions. In Farsi, this closely mirrors English.

To express a ratio or statistical proportion like "one in ten" or "two in a thousand," Farsi uses the preposition در (in) between two numbers.

Structure: [Numeral] + در + [Numeral]

In this alloy, the proportion of tin is one in ten.

Because of the high heat, the error rate in iron casting is two in a thousand.

To introduce these statistics within a sentence, use nouns like نسبت (proportion/ratio) or میزان (rate/amount) before stating the numbers.

Cast iron breaks, unless the proportion of chromium is three in a thousand.

The success rate in making this alloy is five in a thousand.

In this factory, the proportion of scrap is four in a thousand.

For extreme precision, this structure scales effortlessly to larger numbers like a million (میلیون).

The proportion of pure nickel is only one in a million.

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