<span>Marty has saved = $63 </span><span>He spent on a video rental = $3 Remaining money he saved = $63 - $3 = $60 </span><span>portion of his savings left = 60/72 = 30/36 = 5/6 </span>Thus the answer is 5/6 or 5:6
It's an irrational number because it's does not repeating in the same order (the one with a dash above it), and you can't change it into any other form of number, such as fraction or square root of something, so it's an irrational number.