Answer: Well, there are an infinite amount of answers. It could be 8/14, 12/21,16/28,20/35 etc.
Explanation:
Basically, find the GCD of the numerator (top number) and the denominator (bottom number). For example 16/28. The GCD is 4. Therefore, divide both the top and bottom by 4 to obtain 4/7.
You can also multiply the top and bottom number by the same value to arrive at answers equivalent to 4/7.