in my math class my teacher said that 1/3 was equal to 3, my problem ask numbers to be multiplied by a fraction, 1/2 but i need to know how to change it to a whole number

You can make any fraction into a whole number by multiplying the fraction by the same number in the denominator. For example, if you multiply 1/3 by 3, you get 1; if you multiply 1/2 by 2, you get 1; if you multiply 2/3 by 3, you would get 2.

I think, though, that what you probably want to know is how to convert a fraction into a decimal. If that is the case, I think the easiest way to do it is to just divide the numerator by the denominator. For example 1/2 is the same as 1 divided by 2, which is 0.5; and 1/3 is 1 divided by 3, which is 0.3333333 (the 3 repeats indefinitely).

0 . 3 3 3

____________

3 ) 1 . 0 0 0

9

____

1 0

9

____

1 0

9

... (etc.)