The ratio shown in fraction form would be; 
Now to convert it to its simplest form, you need to find their greatest common factor; (so in this case it would be 28...cause 28 goes into 56 evenly)
*Now divide both terms by 28
28 ÷ 28 = 1
56 ÷ 28 = 2
so your ratio 28 to 56 in simplest form is..
Hope this helps :)
Now to convert it to its simplest form, you need to find their greatest common factor; (so in this case it would be 28...cause 28 goes into 56 evenly)
*Now divide both terms by 28
28 ÷ 28 = 1
56 ÷ 28 = 2
so your ratio 28 to 56 in simplest form is..
Hope this helps :)