Write 9/12 as the product of a whole number and a unit fraction

Me because some of question i don’t understand

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical