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If something was specified to be rounded to the nearest hundredth or you are keeping track of significant digits, then you could end up with two digits after the decimal point. An example would be money (dollars and cents). Intermediate calculations may have more than 2 digits after the decimal, but then the amount of money is rounded to the nearest cent (0.01). A specific example that I can think of would be sales tax calculations. Another would be produce or meat, which is sold by the pound, so if something is 99 cents per pound, and it is 1.32 pounds, the price is $1.3068, which is rounded to $1.31.

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Q: Why are there 2 numerals after the decimal?
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