How-to simplify fractions.

I tera wiki, i mahi matou i whakangawari hau runa.

Tuatahi, i mahi au i rua nga patai ko 36/42 me 48/68 ko au i whakawehe i te fractions me tino mama no iho, he tino pai i mahi i te patai n reira, anei taku kiriata.