Can someone explain to me how to solve this equation: (4/9)-1/2* *Exponent ??

I hate myself.I hate my work but have no other option. People near me are OK but are always either scared or are in an licking state. I hate the environment. I can't quit because I hate to learn and what I know is not good enough. Pleaseeeeeeeeeeeee tell me what shoul I do! anyone!

What is 250/1000 in lowest terms help:confused:

1- Add the fractions 2/3, 3/8, and 5/12 and reduce your answer to lowest terms. 2- Subtract the fraction 7 4/5 from the fraction 18 6/15 and reduce your answer to lowest terms. 3- Divide the fraction 14/27 by the fraction 2/3 and reduce your answer to lowest terms. 4- Change the fraction...

How do I make a fraction out of 3 to the negative 2 power? Thanks