Paul's pizzeria sells 45 cheese pizzas and 20 pepperoni pizzas each week. what is the ratio of cheese pizzas to pepperoni pizzas sold each week by paul's pizzeria?
3 : 1
9 : 2
9 : 4
4 : 2

1/800 is the right answer

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)