Do you have to reduce fractions to simplest from when finding probability, or can you just leave it?

Answer 1

If it was blatantly obvious that a fraction could be reduced, then I would expect them to be reduced, e.g. 15/60

but if the reduction was rather obscure, like 2023/2737 and you did not have a calculator handy, leave it alone.

BTW, on most calculators you will find a key "a b/c", many students have no idea what it is.

enter 2023
a b/c
enter 2737
=

what do you get?