They form a proper subset of rational numbers.
a decimal fraction means a fraction that changes into a decimal or a decimal that changes into a farction
0.21 is a decimal fraction.
A number expressed in decimal form usually is a fraction. It is simply a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. And, since it is a decimal fraction, there is not another simpler decimal form.
The decimal form of a fraction is either a terminating or recurring decimal.
9/10 fraction .9 decimal
a terminating or recurring decimal fraction.
Terminating decimal
a recurring decimal
recurring decimal
Any number that can be written as a fraction:15.2=152/10 etc. Any number without a decimal or fraction: 15. Any numbers with decimal numbers that end (4, 2.5) or repeat (1/3, 55/9).
recurring
It is a fraction whose denominator has a factor other than 2 or 5.
5/8 A decimal that does not repeat.
For a number to be rational you need to be able to write it as a fraction. To answer your question, it must repeat as a decimal or else terminate which can be thought of as repeating zeroes. Further, every repeating decimal can be written as a fraction and you can find the fraction by using the formula for the sum of an infinite geometric series.
0.667 is a terminating decimal.
1. take the 1st fraction. divide the NUMERATOR by the DENOMINATOR! 2. ur gonna get a decimal. 3.move the decimal two places to the right. 4. if ur number still has a decimal, round. 5. add a percent sign. 6. repeat with the 2nd fraction
Not sure about a demial, but the number is called a repeating or recurring decimal.