What is 0.12121212 expressed as a fraction

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

The area of square garden is 300m squared. how long is the diagonal?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.