Definition: The value determined by dividing the number of times an event occurs by the total number of times the event was completed. Another word for proportion

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours