square root of 56 = 7.483314774
square root of 58 = 7.615773106
so we just need to come up with fractions that are between about 7.4833 and 7.6158
7.5 = 7 1/2 or 15/2
7.55 = 7 11/20 or 151/20
7.6 = 7 3/5 or 38/5
15/2
151/20
38/5
are your fractions
*Note: there are many other possible answers, I was just exemplifying a few.