is 5 over 7 a rational number
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1). Any number that you can write down completely, using digits, decimal point, and fraction bar, is a rational number. So yes, 5/7 is rational. 2). Any number that can be written as the ratio of two whole numbers is rational. 5/7 is the ratio of 5 to 7. So yes, it is rational.
1 over 6 and many others...
Yes - the proper fraction 7/19 is a rational number.
Yes.
Yes. Any rational number divided by another rational number is also rational.