Decimal representation is a way of expressing numbers using the base-10 system, which includes the digits from 0 to 9. Each digit's position in a number indicates its value, with the rightmost digit representing units, the next representing tens, and so on. For example, in the number 345, the digit 3 represents three hundreds, 4 represents four tens, and 5 represents five units. In addition to whole numbers, decimal representation can also express fractions using a decimal point. For instance, the number 3.14 represents three whole units and fourteen hundredths. This system is widely used in everyday life, including in measurements, currency, and calculations.