These two fractions are equal to each other, and also to 1530.
A fraction written in this way is called a decimal fraction; or we might define a decimal fraction as a fraction having a power of To for its denominator, there being a special notation for writing such fractions.
Fractions other than decimal fractions are usually called vulgar fractions.
The Egyptians as a rule used only unit-fractions, other fractions being expressed as the sum of unit-fractions.
The Greeks originally used unit-fractions, like the Egyptians; later they introduced the sexagesimal fractions of the Babylonians, extending the system to four or more successive subdivisions of the unit representing a degree.