Why or why not can a fraction be simplified if the numerator is a prime number?

"7" is a Prime number.

But you can simplify 7/14, 7/21,/7/28, and so on.

Answer: If the denominator is also a multiple of the prime number, then the fraction can be simplified; otherwise, it cannot. To simplify any fraction, the numerator and denominator must have a factor in common, as in the examples above.