Yes, 22/7 is a rational number. By definition, a rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.
In this case, 22 is an integer and 7 is also an integer. When you divide 22 by 7, you get a decimal approximation of 3.14, which can be written in fractional form as 22/7. Since it satisfies the condition of being the ratio of two integers, it qualifies as a rational number.