off topic but please forgive me me and answer

[Patrick Maupin]

On Apr 3, 9:43 am, "Martin P. Hellwig" > IMHO, the crackpot in this
regard is actually partially right,
> multiplication does mean that the number must get bigger, however for
> fractions you multiply four numbers, two numerators and two
> denominators. The resulting numerator and denominator by this
> multiplication get indeed bigger.

That argument is great!  Just make sure that you've managed to leave
before the class has to learn about irrational numbers that don't
*have* numerators and denominators ;-)