Four fifths minus eight fifteen

Aboard game uses a fair six-sided die and a spinner with five equal-sized sections colored dark blue, green, light blue, red, and yellow. players roll the die and then spin the spinner. match each probability statement to its correct value.

Pls! does anybody know a shortcut for answering these types of questions in the future?

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.