Question

What is decimal in mathematics

Answer 1

It can have several meanings:

decimal is the number system whereby you use symbols (digits) to count to ten before rolling over to the next digit.

"Decimal" may also refer specifically to the digits after the decimal separator, such as in "3.14 is the approximation of π to two decimals".

Answer 2

decimal is any number in our base-ten number system. The decimal point is used to separate the ones place from the tenths place in decimals.