This is a number system to base ten and it make use of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, together with the concept of place values to represent any number whatsoever.

Any number in base ten whether integral or fractional can be expressed uniquely as

X = A0 X 100 +An-1 X 10n-1 + An-2 X 10n-2 + – + An-n X 10n-n + + An-n1 X 10n-n-1 +–