A decimal is a number that is expressed in the base-10 number system, which is the most commonly used number system in everyday life. It consists of digits from 0 to 9, and each digit has a place value based on its position in the number.
The decimal point is used to separate the whole number part from the fractional part. The digits to the left of the decimal point represent the whole number part, while the digits to the right of the decimal point represent the fractional part.
For example, in the decimal number 123.45, the digit 1 is in the hundreds place, the digit 2 is in the tens place, and the digit 3 is in the ones place. The digit 4 is in the tenths place, and the digit 5 is in the hundredths place.
Decimals can also be negative, in which case a negative sign (-) is placed in front of the number. For example, -0.75 is a negative decimal.
Decimals can be added, subtracted, multiplied, and divided using the same rules as whole numbers. They can also be converted to fractions or percentages.
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