$0.07
When writing fractional amounts with a decimal point be VERY careful not to confuse the $ sign and the ¢ sign. It's common to find prices in stores that are written incorrectly, e.g. 0.50¢ when the amount is supposed to be 50 cents.
Because a decimal point in a price indicates anything to the right of it is divided by 100, "0.50¢" isn't 50 cents, it's 50/100 of a cent - or half a penny!!
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In most of Europe the , acts as the decimal point. For example €6,99 is 6 euros and 99 cents. In other countries, like Ireland, the full stop is used: €6.99 instead.
It looks like 3 cents - exactly as in the question! A decimal representation does not imply a change in the measurement units. If this is required then you need to specify the units into which the quantity is to be converted.
a decimal point is a point that looks like a period
Exactly as in the question: 3 You could add a decimal point after the number but it would be inappropriate to write 3.0 since that would imply a greater degree of precision.
To express 2400 as a decimal, you would simply write it as 2400.0. This is because the decimal form of a whole number is the number followed by a decimal point and a zero. So, 2400 as a decimal is 2400.0.