Well think about it, if there is any fraction that is equivalent to 8/50, all you have to do is divide both numbers on their greatest common factor. For example, you would be able to divide them both by 2. So what you wanna do is divide 8 by 2 which would equal 4. And do the same for 50 which is 25. So another equivalent fraction for 8/50 is 4/25. Hopes this helps ^_^
