How are fractions expressed in terms of tenths, hundredths, thousandths, etc. stated after a decimal point?

The expression of fractions in terms of tenths, hundredths, thousandths, and similar units after a decimal point refers specifically to decimal numbers. Decimal numbers are numerical expressions that represent fractions and are written in a base-10 format, using a decimal point to separate the whole number part from the fractional part. For instance, the fraction 1/10 can be represented as 0.1, which clearly illustrates the concept of tenths in decimal form.

In contrast, while fractional numbers can also represent parts of a whole, they are typically outlined in a numerator and denominator format (like 1/2 or 3/4) rather than as decimals. Rational numbers encompass a broader category that includes all numbers that can be expressed as a fraction, including decimals, but the question specifically asks about how fractions are articulated in terms of specific decimal places. Whole numbers refer strictly to non-negative integers without fractions or decimals, making them irrelevant to the context of the question. Thus, the correct answer focuses solely on the representation of fractions as decimal numbers.