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How Do You Know If A Decimal Is Terminating?

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Last updated on 4 min read

You know a decimal is terminating if it has a finite number of digits after the decimal point (e.g., 0.5, 0.75, 1.25), and non-terminating if it continues infinitely (e.g., 0.333..., 0.142857...).

How do you know if terminating or non terminating?

A decimal is terminating if it ends after a finite number of digits, while a non-terminating decimal continues infinitely without ending.

Take 0.5 (which is 1/2) as an example—it stops cleanly. Now compare that to 0.333... (1/3), which drags on forever. The key difference? Look at the fraction’s denominator. If you simplify it and the denominator only contains 2s and 5s as prime factors, you’ve got a terminating decimal. Any other prime factors? That’s your sign you’re dealing with a non-terminating one. MathsIsFun

How do you tell if a decimal is repeating or terminating?

Divide the numerator by the denominator: if the division ends with a remainder of 0, the decimal is terminating; if the remainders start repeating, it’s a repeating decimal.

Try 1/4 = 0.25—it wraps up neatly, so it’s terminating. But 1/6 = 0.1666... keeps dragging that 6 along forever. Another quick trick? Check the denominator’s prime factors. Only 2s and/or 5s? The decimal terminates. Anything else? Expect repeating digits or an endless string. Britannica

What is an example of a terminating decimal?

A terminating decimal is one that ends after a fixed number of digits, like 0.25, 1.5, or 3.75.

These decimals represent fractions where the denominator (after simplifying) has no prime factors other than 2 or 5. For instance, the value of decimals like 3/4 = 0.75 is terminating because 4 is just 2 squared. Honestly, this is one of those math concepts that feels satisfyingly neat once it clicks. Khan Academy

What is a terminating decimal?

A terminating decimal is a decimal number that has a finite number of digits after the decimal point.

Imagine a train pulling into a station—it stops. That’s exactly what a terminating decimal does. Take 5/8 = 0.625, for example. It ends after three digits. Terminating decimals are rational numbers because they can always be written as fractions with denominators made up of 2s and 5s. Wikipedia

Is 9.373 a repeating decimal?

9.373 is not a repeating decimal; it is a terminating decimal.

It ends after three digits, with no repeating pattern. Numbers like 0.333... or 0.142857142857... are repeating because their digits cycle endlessly, but 9.373 stops cleanly. No endless loops here. MathsIsFun

Is 5.692 terminating or repeating?

5.692 is a terminating decimal.

It stops after three digits, with no repeating pattern. Terminating decimals like this can always be written as fractions, such as 5692/1000, which simplifies to 1423/250. Simple as that. Britannica

Is 0.6 a terminating decimal?

0.6 is a terminating decimal.

It ends after one digit, representing the fraction 3/5. Since the denominator is 5 (a prime factor of 10), the decimal terminates neatly. No surprises here. Khan Academy

Is 0.8 a terminating decimal?

0.8 is a terminating decimal.

Like 0.6, it ends after one digit, representing 4/5. Both 0.6 and 0.8 are terminating because their denominators (5) are factors of 10. Easy to remember. Wikipedia

Are terminating decimals rational?

Yes, terminating decimals are always rational numbers.

They can be expressed as fractions where the denominator is a product of 2s and 5s. For example, 0.75 = 3/4, and 1.2 = 6/5. Rational numbers include all integers, fractions, and terminating decimals—so yes, they’re all part of the same family. Britannica

What are non-terminating decimals?

Non-terminating decimals are decimals that continue infinitely without ending, often repeating a sequence of digits.

For example, 1/3 = 0.333... or 2/7 = 0.285714285714... are non-terminating. Some non-terminating decimals are rational (like 0.333... = 1/3), while others are irrational (like π = 3.14159...). The repeating ones are still rational because they can be written as fractions. Wikipedia

What is terminating decimal and non-terminating decimal?

A terminating decimal ends after a finite number of digits, while a non-terminating decimal continues infinitely, often repeating.

For example, 0.5 (terminating) is 1/2, while 0.666... (non-terminating) is 2/3. The difference lies in whether the decimal representation can be written as a fraction with a denominator that’s a product of 2s and 5s. If not, you’re dealing with a non-terminating decimal. MathsIsFun

What makes a decimal repeat?

A decimal repeats when its fraction’s denominator (after simplifying) has prime factors other than 2 or 5, causing the division to cycle endlessly.

For example, 1/7 = 0.142857142857... repeats because 7 is a prime number not equal to 2 or 5. Repeating decimals are rational numbers because they can be expressed as fractions. That’s why they never end—the math keeps looping. Britannica

Is 1.0227 repeating a rational number?

Yes, 1.0227 is a rational number.

It’s a terminating decimal, meaning it ends after four digits. Terminating decimals are always rational because they can be written as fractions (e.g., 10227/10000). No tricks here. Wikipedia

Is 0.9 Repeating a rational number?

Yes, 0.9 repeating (0.999...) is a rational number.

It equals 1, which is a rational number. This might seem counterintuitive, but mathematically, 0.999... = 1 because the difference between them is infinitely small. Both are integers, and all integers are rational. Once you wrap your head around it, it actually makes perfect sense. Scientific American

Edited and fact-checked by the FixAnswer editorial team.
Joel Walsh

Known as a jack of all trades and master of none, though he prefers the term "Intellectual Tourist." He spent years dabbling in everything from 18th-century botany to the physics of toast, ensuring he has just enough knowledge to be dangerous at a dinner party but not enough to actually fix your computer.