How do you write 99 cents in decimal form?

Answer 1

$0.99

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I disagree. The above answer is 99 hundredths of a dollar. That happens to be 99 cents but what if the question were in terms of Euro-cents?

The decimal form is simply a way of representing a number - irrespective of how it might look in other units UNLESS the question specifies that the decimal form should be in the context of the other unit (dollar, Euro or whatever).

Therefore, the correct answer is that 99 cents, in decimal form is simply 99 cents.