Answer:
An irrational number is a real number that can't be written as a fraction.
Ex. 
A rational number is a real number such as a whole number, fraaction, decimal, or integer.
Hmm I think this is 1/2
Sorry if I'm wrong I'm not the best at math
Write out your scores. ...
Write out the total possible points. ...
Add up both columns. ...
Calculate your average grade. ...
Multiply the decimal number by 100. ...
Determine your letter grade or grade point equivalent (GPA).