Whole numbers
There are infinitely many fractions which must be represented by non-terminating decimals, not just one.
Restate the question: If you can write a fraction as a decimal, can you write a decimal as a fraction?Yes.
155 is an integer not a fraction.
3
If the denominator of the fraction has any prime factor other than 2 or 5, then it has a decimal representation with a repeating sequence of digits. If the denominator is a product of any number of 2s or 5s then it can be represented as a terminating decimal.
There are infinitely many fractions which must be represented by non-terminating decimals, not just one.
The relationship between fractions and decimals can be seen as follow. Fractions can be represented as ratio of two numbers and on dividing can give a decimal value. And decimal value can be converted into a fraction too.
You can multiply it by the denominator of the fraction you want to turn it in to. For example, .125 * 8 = 1, therefore, 1/8 = .125. Keep in mind that only some decimals can be made into simplified fractions. For example, .453 can be represented in simplest form as 453/1000.
Restate the question: If you can write a fraction as a decimal, can you write a decimal as a fraction?Yes.
155 is an integer not a fraction.
3
If you convert repeating decimals into a fraction, you see that the repeating decimals are rational.
decimals
If the denominator of the fraction has any prime factor other than 2 or 5, then it has a decimal representation with a repeating sequence of digits. If the denominator is a product of any number of 2s or 5s then it can be represented as a terminating decimal.
you can change the fraction into a decimal or vice-versa
They are related because you can comvert decimals into fractions,and fractions into decimals.
Of course all the decimals have fractions except those with non-recurring and non-terminating decimals.