15/3 = 5
5 is an integer.
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No. An irrational number is any number that is not a rational number; A rational number is any number that can be expressed as one integer over another integer. negative 3 over 4 is one integer (negative 3) over another integer (4), and so is a rational number.
Yes. Any number that can be written as one integer over a non-zero integer is a rational number. 2 3/5 = (2×5+3)/5 = 13/5 which is the form of one integer over a non-zero integer, thus it is rational.
4/15 is the most reduced form of that fraction with integer numerator and denominators.
3 over five 2/3 = 10/15, and 3/5 = 9/15. 2 over 3 (10/15) is obviously bigger than 3 over 5 (9/15).
1 over 3 is a third. A third of 15 equals 5 (3 x 5 = 15)