The number 1/7 is a rational number. A rational number is any number that can be expressed as the quotient or fraction p/q of two integers, where p is the numerator and q is the non-zero denominator. In this case, 1 is the numerator and 7 is the denominator.
Rational numbers include all integers, fractions, and repeating or terminating decimals. Since 1/7 can be expressed as a fraction of two integers, it fits the definition of a rational number.
When you divide 1 by 7, you get a repeating decimal: 0.142857142857… This repeating pattern is another characteristic of rational numbers. Therefore, 1/7 is not only a rational number but also a repeating decimal.