Decimal Fraction

A decimal fraction is a fraction where the denominator (the bottom number) is a power of ten (such as 10, 100, 1000, etc).

You can write decimal fractions with a decimal point (and no denominator).
This can make it a lot easier to do calculations like addition and multiplication on fractions.

Examples:

43/100 is a decimal fraction and it can be shown as 0.43
51/1000 is a decimal fraction and it can be shown as 0.051